Physical Science CHS 2013-14

Physical Science CHS 2013-14UNIT 2Motion, Forces, Energy10/3/13Entry Task

If a car travelled 60 miles and it took the car 2 hours, how many miles per hour was its average speed? Mathematically speaking, what does the per in the above question mean?

REMEMBER! All missing work for unit due tomorrow!HOMEWORK start WHEN FINISHED WITH TEST: Read pages 76-80. Answer all questions #1-10 on page 80. Due Monday 10/7/13

Todays AgendaStudents needing more time on the test will be finishing their tests.HOMEWORK start WHEN FINISHED WITH TEST: Read pages 76-80. Answer all questions #1-10 on page 80. Due Monday 10/7/13PLEASE BE RESPECTFULLY SILENT AND SEATED until all tests are turned in. EXTRA TIME? Complete the Designing an Investigation Crossword for extra credit

10/3/1310/4/13Entry Task

Say Something NiceFor 2 free points!What does the fox say?

Reminder HOMEWORK : Read pages 76-80. Answer all questions #1-10 on page 80. Due Monday 10/7/13Todays Agenda take notes with a partner pages 76-85complete as HOMEWORK!Vocabulary give meaning in own wordsSpeedAverage SpeedInstantaneous SpeedVelocityDistanceConstant speedSlope

How is velocity different than speed? How do you show forwards and backwards movement?What is the difference between distance and change in position?What does a straight line mean on a position vs time graph?How can you recognize a relationship on a graph?How do you calculate slope? What does slope also indicate?Sketch a position vs time graph. Sketch a speed vs time graph

Key Ideas take notes on these ideasWhat is the difference between average speed and instantaneous speed?10/4/13Exit Task

Trade and Grade week of 9/30-10/42 more free points for your HIGH INTEGRITY gradingPlease be sure to only give points when it is earned!

Reminder HOMEWORK : Read pages 76-80. Answer all questions #1-10 on page 80. Due Monday 10/7/13PLUS C-notes vocab AND key ideas pages 76-85. Also due Monday 10/7/1310/7/13Week of 10/7 to 10/11New Seating ChartEntry Task

Dino can leap 400 meters in 30 minutes. This includes brief sprints to catch butterflies. What is his average speed in m/min? What is his average speed in m/hr? Can you tell his velocity? Why or why not?Todays AgendaPlease get out p. 80 homework #1-10.Trade and Grade.Please also get out your C-notes vocab and key ideas pages 76-85. Brief review with name cards.Turn in all homework!See next slideplanning an investigation. Planning a Speed InvestigationYou will choose the independent variable. GOAL: find a way to increase the velocity of the car once it crosses the photogate at bottom of ramp. Write down your independent variable choices:Adding mass - mass balls 1,2,3Placement of mass balls front, middle, rear holeRubber bands distance stretched - # of rubber bands 1,2,3Height of rampPlacement of photogate high, medium, lowTemperature of car cold, warm, hotOil on axle light, medium, heavy application

10GREEN SHEET Designing an Investigation You will each complete all portions listed on green sheet in your composition notebooks. TITLEIdentify variablesQuestionHypothesisMaterials and PROCEDUREBe thorough and thoughtful with this section!3 trials for each of 3 conditionsExperimental Control ConditionExtra Validity MeasuresDATA TABLE I will post thisyou add your groups labels and measurements. Have design finished for tomorrow! Approval by start of class tomorrow10/7/13Exit Task

What independent variable did your group choose? What is your Hypothesis? 10/8/13Entry Task

What is the experimental control condition? What are extra validity measures?For this lab, what will you do for both of the above?

Get pages 118-119 as PDF.14Todays AgendaGet approval for your lab design before you beginBe sure your data table is completeBe precise in your measurements. Complete data collection and calculating averages and speed today. EXTRA TIME? Begin designing your graph. 10/8/13Exit Task

What 3 controlled variables did you include in your lab design?

10/9/13Todays AgendaEACH PERSON WILL:Collect and record data with their team. Create a graph of your results consult green sheet.Draft and write conclusion consult green sheet.IN THEIR COMPOSITION NOTEBOOKSGet extra graph paper1810/9/13Exit Task

Begin your conclusion from your dataAnswer your investigative question, How does ( your chosen independent variable) affect speed through the gate? Was your hypothesis supported?

HOMEWORK: Speed Practice Sheet. Due Friday 10/11/13Review Rubric

10/10/13Entry Task

If I told you an object ACCELERATES 9.8 m/s each second and I let it drop from a standstillHow fast would it be going after 1 second? Draw a picture to help you!

REMINDER HOMEWORK: Speed Practice Sheet. Due Friday 10/11/13

Todays AgendaComplete graphs. Complete conclusionsShare good student examples. See how many points you will get. Partner DiscussFix yours where you need to. Be ready to turn in tomorrow. Look at Mikes old exams.2110/10/13Exit Task

What does acceleration mean? How is this different than speed?

REMINDER HOMEWORK: Speed Practice Sheet. Due Friday 10/11/13

10/11/13Entry Task

Say Something NiceFor 2 free points!

DUE DATES EXTENDED!!!HOMEWORK: Speed Practice Sheet. Due Monday 10/14/13SPEED LAB: Due Monday 10/14/13

Todays AgendaPre-assessment of understanding of Motion, Forces, Energy. Your score will NOT be your grade. You are graded on effort and completion.At the end of the unit, youll be given a similar assessment and you can track your growth!

10/11/13Exit Task

Trade and GradeFor 2 free points

10/14/13Week of 10/14 to 10/18Entry Task

Which unit would you use with acceleration? Why is the bottom letter squared?

Student self-assessmentAcceleration lecture and C-notesAssign acceleration HW from CPO ancillary??? Hand out PS standards sheet26Please take out your homeworkTrade and Grade math problems. Grader sign at top. DO NOT COPY ANSWERS FROM BOARD = cheating. Self-assessment of lab investigation. See Ms. Marings example. Grade your own by carefully writing the points earned in the margin.ALSO, circle on your rubric what you did not include. PLACE YOUR RUBRIC in your comp book by the lab. Turn in to comp book shelves. I will lock them.15 min27Todays AgendaHand back papers and organize into binders. If you are on the PASSING list for the Unit 1 test, you may design a lab based on one of the other independent variables. See sheet. Form a team of 3-4 and collect data for that independent variable on the provided data table. If you are in the REQUIRED REFLECTION group, you will join me for a discussion of the test 10 min28Passed Unit 1 test on your own further investigative question labYou will choose a different independent variable from this list Adding mass - mass balls 1,2,3Placement of mass balls front, middle, rear holeRubber bands distance stretched - # of rubber bands 1,2,3Height of rampPlacement of photogate high, medium, lowForm a team of 3-4 with the same choice, write a brief lab design and collect data. Please clean up and return materials when finished.

30REQUIRED REFLECTION Unit 1 testIf you had a score of 60% or below, you are required to reflect. Please get out a piece of notebook paper. Review reflection instructions. You will be given the test back for this class period only. If you need more time, please schedule with me before/after school to use the test. For each question you are seeking points back, Write down the PROBLEM NUMBER and answer a, b, c, d.The correct answer is shown in RED on your scan-tron paper. You may write down the answers on your written sheet.You will staple your scan-tron and written section to your reflection.25 min3110/14/13Exit Task

How could you show a change in velocity WITHOUT a change in speed?What is another name for change in velocity?

10/15/13Entry TaskPlease sketch a graph of the following (x axis time; y axis velocity)From the river to the woods, Little Long-legs Red Riding hood accelerated from a starting velocity of 0.5 m/s to 1 m/s after 60 seconds. At the woods, she got scared and began running to grandmothers house, accelerating from 1 m/s to 10 m/s in 30 seconds and then continued at that constant speed for the next 2 minutes.

HOMEWORK DUE THURSDAY 10/17/13: Read pages 86-93. Answer questions #1-11 on page 93. REMINDER you will need to bring your calculator EACH day for the rest of this unit!!! 33Acceleration

STANDARDS performance expectationsAccelerationa change in velocity (speed or direction or both) over timespeeding up or slowing downchanging direction moving in a circle is always changing direction

http://phet.colorado.edu/en/simulation/moving-manChanging directionNegative accelerationif acceleration is a negative number it is referred to as negative acceleration or deceleration

Think braking!

The steeper the hill, the greater the accelerationNot very steep. Adding 1 m/s to the speed each second. Very steep. Adding 2 m/s to the speed each second. Greater acceleration will be a steeper slope on a speed vs time graph

Zero Accelerationthere is zero acceleration at constant speed because the speed does not change.

Think cruise control!(As long as direction stays the same)Math for Acceleration

Same math as in your bookp 87Dont write this downExample problemA car is traveling at 3.4 m/s. After 3 seconds, it is now traveling 8.2 m/s. Calculate its acceleration.Looking for:Solution:

Given:Formula:accelerationV1 = 3.4 m/s V2 = 8.2 m/sT = 3 seconds10/15/13Exit taskA bike is traveling at 2.0 m/s. After 3 seconds, it is now traveling 5.0 m/s. Calculate its acceleration.

Looking for:Solution:Given:Formula:HOMEWORK DUE THURSDAY 10/17/13: Read pages 86-93. Answer questions #1-11 on page 93. REMINDER you will need to bring your calculator EACH day for the rest of this unit!!! 10/16/13Entry taskA bird is flying at 6.0 m/s. After 2 seconds, it is now flying 2.0 m/s. Calculate its acceleration.

Looking for:Solution:Given:Formula:accelerationV1 = V2 = T = 5 min46Designing the InvestigationQuestion: How does placement of photogates affect acceleration of the car? Make a prediction: If the photogates are further apartThen ________________________Because______________________Controlled variables: Copy these as packet or F/B since comp books awayRead through and show lab. Write increase, decrease, stay the samebecause more time to have the velocity change more, more friction slowing down the car, the slope is the same so acceleration should be the same.10 min max do together 47Acceleration LabC-clamps at far top and far bottom of ramp. Ramp in 5th hole from bottom.Photogate 1 will be at top black square mark. Photogate 2 will be 10 cm below that. Photogate 3 will be at first black mark below middle of rampPhotogate 4 will be 20 cm below that.Run car from top of ramp. Record time at each photogate. And Record time between photogates. Repeat for 3 trials.Sit down to calculate averages, velocity and acceleration. We will calculate velocity at photogate 1 as v1.We will calculate velocity at photogate 2 as v2.Then we can calculate acceleration as change in velocity with respect to time between photogate 1 and 2. We will calculate velocity at photogate 3 as v1.We will calculate velocity at photogate 4 as v2.Then we can calculate acceleration as change in velocity with respect to time between photogate 3 and 4.

Need 4 data collectors. 4 photogatesHave students modify data table to add spots for tAB10-15 minutes4910/16/13Exit Task

Did the car accelerate as it rolled down the ramp? In other words, were there changes in the cars velocity over time (or between photogates)? Use data from your data table to back up your answer!REMINDER HOMEWORK DUE TOMORROW 10/17/13: Read pages 86-93. Answer questions #1-11 on page 93. 5 minutes5010/17/13Entry Task

Imagine yourself on a bicycle or skateboard what outside influence would cause you to accelerate or decelerate?Per 1 Earthquake drill prepPlease take out your homework - pages 86-93. Answer questions #1-11 on page 93. Trade and Grade turn in.

Todays AgendaYou will be doing 1 of the following:REFLECTION on Unit 1 Test required if you failedoptional if you want to improve your grade. TESTS ONLY AVAILABLE IN CLASSROOM.EXTENSION LAB for extra credit.Acceleration Lab Analysis Questions.otherwise this will be homework10/17/13Exit Task

Trade and Grade week of 10/14 to 10/17.

HOMEWORK please complete Acceleration Lab Analysis Questions for Monday. 10/18/13 NO SCHOOLTeacher Inservice10/21/13Week of 10/21 to 10/25Entry Task

Explain all parts of a good conclusion. (Consult the green sheet.)What does gives the data. mean? How would a good conclusion include data? What kind of data?Please get out your acceleration lab and lab analysis questions (That was your homework!)Todays AgendaHand back papers and organize into binders. Final day for Unit 1 reflections. Play Jeopardy to study for Quiz tomorrow. RULES: There will be two teams. Each row on a team will have a whiteboard to write answers. Nominate a recorder. When the question is displayed, all rows will huddle to discuss and record correct answer. Each row to get the answer correct receives the points at stake. The team with the most points at the end WINS!

10/21/13Exit Task

What do you need to study tonight? Which resources will you use?10/22/13Entry Task

Prepare for the quiz. Please turn in your homework acceleration lab and analysis questions plus graphs.You may have a pencil or pen, calculator, and your acceleration notes ONLY on your desk for the quiz. Everything else under desks.QUIZTalking or looking at another students paper will be considered cheating = zero on quiz and reported. When completed, please check your work. Raise your hand for an adult to pick up your quiz. Finished early? Start on HOMEWORK. Two parts Due Friday 10/25/13 :Read pages 97-104. Answer questions 1,2,4,6,7,8 on page 104.Read pages 107, 109, and 112 and 114-119. Answer questions 1,2,3,4,5,8 on page 11910/22/13Exit Task

None testing

HOMEWORK. Two parts Due Friday 10/25/13 :Read pages 97-104. Answer questions 1,2,4,6,7,8 on page 104.Read pages 107, 109, and 112 and 114-119. Answer questions 1,2,3,4,5,8 on page 119

10/23/13Entry Task

What would you call a push or pull on an object? If this push or pull occurred on an object, what do you think the results would be for the object? Describe in terms of speed, direction, or acceleration. HOMEWORK - Two parts Due Friday 10/25/13 :Read pages 97-104. Answer questions 1,2,4,6,7,8 on page 106.Read pages 107, 109, and 112 and 114-119. Answer questions 1,2,3,4,5,8 on page 119

ForcesNewtons, Friction, Gravity, Weight and Free Body DiagramsSTANDARDSWhen given specific scenarios, I can compare the motion of an object acted on by balanced forces with the motion of an object acted on by unbalanced forces.I can predict how objects of different masses will accelerate when subjected to the same force. I can calculate the acceleration of an object, given the objects mass and the net force on the object, using Newtons Second Law of Motion (F=ma).Using everyday examples, I can illustrate that for every action there is an equal and opposite reaction (e.g., a person exerts the same force on the Earth as the Earth exerts on the person).I can predict how the gravitational force between two bodies would differ for bodies of different masses or different distances apart.I can explain how the weight of an object can change while its mass remains constant.5.1 The cause of forcesA force is a push or pull, or an action that has the ability to change motion.Forces can increase or decrease the speed of a moving object. Forces can also change the direction in which an object is moving.

5.1 NewtonsAlthough we use pounds all the time in our everyday life, scientists prefer to measure forces in newtons. The newton (N) is a metric unit of force.

Forces act during Direct ContactA contact force is transmitted by matter directly touching other matter such as wind acting to slow a parachute.

Forces act over a distanceThe force of gravity between Earth and Moon appears to be what people once called action at-a-distance.Today we know that the gravitational force is carried from the Earth to the Moon by a force field.

Force of Gravity = weight The force of gravity on an object is called weight. At Earths surface, gravity exerts a force of 9.8 N on every kilogram of mass.

Weight depends on mass and gravityA 10-kilogram rock has the same mass no matter where it is in the universe. On Earth, the10 kg. rock weighs 98 N.. On the moon, the same rock only weighs 16 N.

5.2 FrictionFriction is a force that resists the motion of objects or surfaces.Many kinds of friction exist.

705.3 Adding forcesTo figure out if or how an object will move, we look at ALL of the forces acting on it.For example - Four forces act on a plane: weightdrag (air friction)the thrust of the engines, and the lift force caused by the flow of air over the wings.5.3 Normal forcesWhen the forces are balanced, the net force is zero.When the net force on an object is zero, we say the object is in equilibrium.

725.3 The free body diagramHow do you keep track of many forces with different directions? Draw a free-body diagram that contains the objects, like a book on a table.

73sliding frictiongravityme pushingnormal force or the table= direction of motion

= force vector10/23/13Exit Task based on the following forces, which way will the plane move?

10/24/13Entry Task

Recall the cars on the ramps. At the moment you release the car, draw a free-body diagram showing all the forces. HOMEWORK - Two parts Due Friday 10/25/13 :Read pages 97-104. Answer questions 1,2,4,6,7,8 on page 106.Read pages 107, 109, and 112 and 114-119. Answer questions 1,2,3,4,5,8 on page 119

Name_____ Partners _______ ________Observing Forces at WorkPurposeObserve various forces and their direction at 1-8 lab stations.ProcedureDraw a free-body diagram of the forces involved at each station.vectors should show the DIRECTION and RELATIVE STRENGTH of forcestry to label the vectors with the type of forcecontact: sliding, rolling, static, fluid friction, or normal forcenon-contact: magnetism, electrical, gravityif necessary, an explanation can accompany your free-body diagram or use different arrows to show movementTodays AgendaFinish notes. Complete all the lab stations in any order in your composition notebook.When finished, sit down and work on the worksheet of Free Body Diagrams. Complete diagrams on the back or on your own paper. Finished early? Work on your homework for tomorrow!

10/24/13Exit Task

Draw the forces on the Newtons Cradle at the moment of impact. Extra Time? Draw another when the ball is at the peak of its swing.

10/25/13Entry Task

Say Something Nice

Please take out your homework. What percentage did your class achieve? Make sure your name is at the top.Trade and Grade. Todays AgendaComplete Lab Activity from Yesterday. Work on and turn in Free Body Diagram Practice Sheet. Due Monday. Extra time? Next force lab complete activities at each station in composition notebook. 10/25/13Exit Task

Trade and Grade10/28/13Week of 10/28 to 11/1Entry Task

Using the textbook or your own knowledge, explain Newtons First Law of Motion.

Review and Turn in Free Body Diagram Practice. Todays AgendaWatch Newtons Laws of Motion video and take notes 15 minSummarize the 3 Laws in your own words. - 5 minWatch Road Runner 10 minRaise hand to pause and discuss when you notice a law in action OR objects ignoring Newtons LawsReview Project Details/Student work and Begin Brainstorm continue tomorrow10/28/13Exit Task

From your notes, explain Newtons Second Law of Motion. 10/29/13Entry Task

Watch Ms. Marings demonstration. {I will place a paperclip on a notecard on a beaker. I will flick the notecard strongly and the paperclip will fall into the beaker when the notecard moves out from under it.}Explain the motion of the objects in terms of Newtons Laws. TURN IN YOUR HOMEWORK! The free body diagram practice! Todays AgendaGOAL by end of class have storyboard draft complete. Who will your characters be? What will they do to show Newtons 3 Laws? Whatever you do not finish is homework. You will get peer feedback tomorrow in order to revise and finalize your cartoon.

10/29/13Exit Task

Briefly explain how the actions of your characters show Newtons Laws: 1. Inertia staying at rest or in motion2. F = ma (greater mass requires greater force for equal acceleration)3. Equal and Opposite action/reaction forces.10/30/13Todays AgendaIn your small groups, you will each share your cartoon read it, point out how you showed the laws. Please take turns and dont dominate the time. On Say Something Nice slips, each person will give feedback one great thing and one area of concern. Following feedback, you can begin on final draft. Please consider suggested revisions.Cartoon Peer WorkshopGroups of 3 or 4

Each person present draft storyboard explaining motion and ideas, and what you plan to add

Suggest what feedback you are looking for For example, help representing the laws, or help with your storyline, or help with the artwork itself, or help with the dialog, etc

Each listener will jot down some notes or comments for constructive feedback on the pieces of scrap paper.

Do be respectful and follow workshop guidelines!

Peer Workshop EtiquetteAll comments have to be constructive. No trash talking allowed.You have to comment on the work in front of you, not what you would have written if it had been your idea. Even if you think your idea is better.Don't try to rewrite for the author. The author can do that him/herself. Just point out the areas of concern.(borrowed from Meir Ribalow of a NYC playwrights group)

10/30/13Exit Task

Look at the picture on page 136 in your textbook. Why, if the reaction/action forces are equal, does the elephant have less acceleration?10/31/13Entry TaskCalculate the acceleration if a cars mass is 1000 kg and a net force of 2000 N is exerted on the car. Show your work!

Todays AgendaComplete Final Drafts of cartoons. Your packet should be paperclipped and include:Rubric on top with nameSummary of laws on notesRough Draft Story BoardFinal Draft CartoonWritten Summary of how you showed the lawsNEWTON CARTOONS DUE FRIDAY START OF CLASSbut you can turn them in todayHOMEWORK read pages 125-138. On page 135, answer # 3,4,6,7On page 143, answer # 6a, cDUE MONDAY November 410/31/13Exit TaskHow much force would you need to accelerate a 20 kg object to 20 m/s2?

HOMEWORK read pages 125-138. On page 135, answer # 3,4,6,7On page 143, answer # 6a, cDUE MONDAY November 4

11/1/13Entry Task

Say Something Nice

HOMEWORK read pages 125-138. On page 135, answer # 3,4,6,7On page 143, answer # 6a, cDUE MONDAY November 4

Todays AgendaIntroduce Egg Drop designing your project is additional homework for the weekend. Complete self assessment regarding standards.Return and graph pre-assessment. Set Goals.

Egg Drop write in your composition notebook!Problem: Design a container that will keep an egg from breaking when dropped from the school roof.Constraints: When dropped from the roof, the egg cant break.Criteria: The vessel must be as low in mass and As small in size as possible to keep the egg safe.

Background InformationEgg will be provided day of the drop Tuesday, Nov. 5thNo parachutes, propellers, gliders, or Helium balloonsNo glass or anything dangerousNo motors or engines of any kindThe egg must be returned in original condition for pointsPoint Values for ContainerSize:10 cm X 10 cm = 4 points20 cm X 20 cm = 3 points30 cm X 30 cm = 2 pointsLarger = 1 pointsMassEgg mass = 60 g.Less than 50 g container = 4 points50 - 100 g container = 3 points100 - 150 g container = 2 points150 -200 or larger = 1 points

Due Monday:Labeled sketch with written description (4 pts.)Due Tuesday:YOUR CONTAINER!!! You can bring it Monday (8 pts possible if both light and small)Wednesday: Analysis (8 pts.)If your egg survived:1. Write an explanation of how your design protected the egg (include a discussion of forces).2. If you could redesign your container, how could you make it smaller and lighter, while maintaining its ability to protect the egg?If your egg did not survive:1. Write an explanation of why your design did not protect the egg (include a discussion of forces).2. If you could redesign your container, how could you make it work to protect the egg, while still trying to keep it as small and light as possible?

11/1/13Exit Task

Trade and Grade11/4/13Week of 11/4 to 11/8Entry Task

Find a definition for Law of Universal Gravitation in textbook.

Please turn in your homework from pages 135 and 143. Todays Agenda11/4/13Exit Task

Explain how your egg drop container will protect the egg?

Reminders: Tomorrow Ms. Maring will check your designs and explanations. AND you need to bring the actual container for the Egg Drop!11/5/13Todays AgendaWatch Phet SimulationReview law of gravitation sheet turn in. Egg drop TOMORROW because I need to buy more eggs!Find mass and size of egg drop container. 11/5/1311/6/13Entry Task

2 objects are originally attracted to each other with 16 units of force. What will the new force be if the distance quadruples?

EGG DROP CONTAINERS IN CUPBOARD.drop has to be tomorrow due to short classes today.Please turn in your Universal Gravitation HW.

Todays AgendaComplete red sheets with pre-test graph and goals.Hand back papers. Review quiz answers12 or less = REFLECTION required. Anyone can do a reflection to get points back. Extra Time - NOTES: A little more about gravity and how to calculate weight.

Ask Aleda if students carry eggs back to room drippy? Open over sink? Or?11111/6/13Exit Task

We have learned a number of formulas in this unit. Write down TWO and explain each of the parts. Choices: speed or velocity, acceleration, Newtons 2nd Law, universal gravitation. CANCELLED due to short classes.Speed or velocity, Acceleration, F=ma, universal gravitation11211/7/13Entry Task

Seating chartExplain how your egg drop materials meet the criteria for least size and mass. Todays Agenda10 minutes - Insert eggs into containers to prepare for drop. 10 minutes - Place your project on your comp book opened to your design. I will record mass and size. 15-20 minutes - You will exit out the door by horticulture and stand near cafeteria. Let me know if there is a particular way to drop your egg container. Collect containers into bag10 minutes - Return to classroom to assess casualties and write analysis.

11/7/13Exit Task

Summarize how you would improve your design in terms of mass, size or better protection.

For 8 points your written analysis is due on Tuesday you will turn in your comp book. 11/8/13Entry Task

Say Something Nice

For 8 points your written analysis is due on Tuesday you will turn in your comp book.

Todays AgendaWatch the video - Answer the reflection questions on your own paper. These answers will be due Tuesday with your Egg Drop Analysis. 11/8/13Exit Task

Describe 2 aspects of Newtons life which were different than you might have expected of a great scientist.

PLEASE TURN IN YOUR ENTRY/EXIT TASK SHEETS!!For 8 points your written analysis is due on Tuesday you will turn in your comp book.

11/12/13Entry Task

Compare mass and weight how are they the same and different?

Todays AgendaDiscuss Questions about Sir Isaac NewtonTurn in Composition Books with Egg Drop Analysis QuestionsHand Back Papers binder organizing session20 minutes notes on Weight and GravityPractice Problems: Mass, Weight, Gravity due FridayAssign weight problems12011/12/13Exit Task

Compare Newtons Second Law formula F=ma to the formula for weight W = mg Remember, here g is acceleration due to gravity.

11/13/13Entry Task

Find a definition of WORK in your physical science textbook. Explain how this is different than our everyday understanding of the word work.

Example weight problem122Todays AgendaNotes on Weight and GravityPractice Problems: Mass, Weight, Gravity Worksheet due Friday November 15 2013.

123Gravity and Weight

Zeus has the following:golf ball (70 grams)foam ball (30 grams)plastic ball (15 grams).He holds them all exactly ten inches off the ground and drops them at the exactly the same time. In what order will they hit the ground?I. 1,2,3II. 3,2,1III. all at the same time

It is said that Galileo first dropped two cannonballs off the Leaning Tower of Pisa in Italyone was 10x heavier than the otherthey both hit the ground at the same time

Without air resistance, all objects fall at 9.8 m/s2 (on earth)http://www.youtube.com/watch?v=_XJcZ-KoL9o&feature=related

http://www.physicsclassroom.com/class/1dkin/u1l5e.cfm

Newton used Galileos research to conclude that objects accelerate downwards because of the force of gravity between the object and the earththis acceleration is 9.8 m/s/s (or 9.8 m/s2) in a vacuum (no air)however realistically, air resistance (fluid friction) often prevents many objects from accelerating this fast

Weighta measure of gravitys force on an object that is directly proportional to its massthis means gravity pulls more on objects that are biggerit does NOT mean it will fall fasterweight can change depending on the force of gravityyou weigh less on the moon than on the Earth because the moon has less gravity

http://csep10.phys.utk.edu/astr161/lect/history/newtongrav.html Weight is a measure of force of gravity

W = Weight (Force of gravity)m = massg = acceleration due to Earths gravity which is 9.8 m/s2Uses the second law:F = maW = mg or W = mg Weight formulaExample problemWhat is the weight of a 50 kg person on Earth?

weightMass = 50 kgOn earth acceleration due to gravity = 9.8m/s/sF=ma or W = mgW = 490 NEWTONS (N) 11/13/13Exit Task

We have learned a number of formulas in this unit. Write down TWO and explain each of the parts. Choices: speed or velocity, acceleration, Newtons 2nd Law, weight formula, universal gravitation.

11/14/13Entry Task

Look in the science textbook for a definition of POWER. What is the everyday definition of power? POWER p. 170WORK p. 152134Todays AgendaA few more notes on WORK and POWERSet up for Horsepower Lab

Work and Power

Workis the transfer of energy that results from applying a force over a distance if nothing moves, no work was doneunit of measurement is the Joule (J)used to be a Newton-meter (Nm)Eureka! Episode 8 - Work (4:57)

Work FormulaExample problemHow much work is done when a 60 Newton dog is lifted up7 meters? *Could have put N(m) instead of Joules same thing.

workForce = 60 NDistance = 7mWork = Force x DistanceWork = 60 N x 7mWork = 420 N(m)Work = 420 Joules3 m3 mThis one would require less effortWork is the same.Same distance means same work (even if its easier)Powerhow fast work is being doneunit of measurement is the watt (W)James Watt, a Scottish engineer, invented the steam engine.James Watt explained power as the number of horses his engine could replaceAmericans often use horsepower1 horsepower = 746 watts

Power FormulaExample problemA motor does 500 Joules of work in 5 seconds. How much power does the motor have?

J/s is the same as a watt

PowerWork = 500 joulesTime = 5 secondsName Human HorsepowerGOAL: To calculate human horsepower when climbing stairs.MaterialsStop watch, meter stick, student, calculator, stairsProcedureWork in partners to collect data. Record your weight in pounds.Measure height of stairs.Record time to climb the stairsCalculate weight as force, work, power, and convert to horsepowerData Collection for Human HorsepowerWeight_______lbs.Height of stairs _3.04__mTime to climb stairs _______sec.

Using this data, you will calculate mass, weight in newtons, work, power and horsepower (American). Calculations for Human HorsepowerConvert your pounds to mass. We know that 1 pound = 0.45 kg. Calculate your weight as a force. Use weight formula. Units will be NEWTONS.Calculate the work to move your weight the height of the stairs. Use work formula. Units will be JOULES. Calculate the power, or the work in a measured amount of seconds. Use power formula. Units will be WATTS.Convert power to horsepower. We know that 1 horsepower = 746 Watts11/14/13Exit Task

How is WORK related to POWER? (In Science class )

REMINDER Weight Practice Problems due tomorrow!

11/15/13Entry Task

Say Something NiceTodays AgendaWork time to complete Horsepower Lab Calculations OR complete Weight Practice Homework. During work time I will be grading your WEIGHT, WORK and POWER notes. END OF WORKTIME calculate on-time HW percentages per class. Trade and Grade Weight Practice Homework.Rest of class watch Newton Video answer questions. 11/15/13Exit Task

Trade and GradePlease turn in your Entry/Exit Task sheets

You may turn in your Human Horsepower Lab on Monday11/18/13Week of 11/18 to 11/22Entry Task

List all the energy forms you know.

Mini unit on energy 2 days7.2 pages 155-166 review questions ALL151Todays AgendaReview Horsepower Lab turn in. Introduce Kinetic and Potential Energy with notes. HOMEWORK: read pages 155-166. Answer #1-5 on page 166. Due Thursday 11/21/13Forms of Energy1532 Types:Potential Energyis stored energy.Depends on what and where the energy is stored.Kinetic Energyis the energy of motion.Depends on what moves and how it is moving.154Kinetic EnergyMechanical: objects moving from one place to another. Wind, water flowing, cars moving, and rocks falling.

155Kinetic EnergyThermal: the internal energy in substances - the vibration and movement of atoms and molecules. More energy causes the particles to move faster.

156Kinetic EnergySound: the movement of energy through substances by vibration of particles in longitudinal waves (think slinky!).

157Kinetic EnergyElectrical: the movement of current through a conductor. Lightning, sparks, and electricity.

158Kinetic EnergyRadiant: electromagnetic energy that travels in transverse waves. Visible light, x-rays, radio waves, etc.*all EM waves move at the speed of light in a vacuum*dont need matter to travel!

159Potential EnergyChemical Energy: energy stored in the bonds of atoms and molecules. Petroleum, natural gas, coal, car batteries, sugar, food.

160Potential EnergyMechanical Energy: energy stored by the position of objects or by compressing objects. Compressed springs, stretched rubber bands, objects raised to a height (gravitational).

161Potential EnergyNuclear Energy: energy stored in the nucleus of an atom - the energy that holds the nucleus together.*nuclear fission results in the direct conversion of mass to energy

162KINETIC ENERGYdepends on the objects mass and velocityNOTE velocity is squared so will have more influence

Example problemHow much kinetic energy is in a 5 kg ball with a velocity of 7 m/s?

Kinetic EnergyMass = 5 kgVelocity = 7 m/sEk = mv2Ek = mv2 = 5kg (7)2 = 122.5 Joules PE = Potential Energym = massg = acceleration due to gravity on earth (9.8 m/s2)h = heightgravitational PE = m g hGravitational Potential Energy FormulaExample problemWhat is a gravitational potential energy of a 5 kg brick 4 meters high? or kg(m/s2)(m)

PEMass = 5 kgGravity = 9.8 m/s/sHeight = 4 m

PE = mghPE = (5kg)(9.8m/s/s)(4m) = 196 Joules

Converting between mechanical KE and gravitational PE

Law of Conservation of Energyenergy cannot be created nor destroyed by ordinary meansin a closed system, it is not used up but just converted to another form and therefore remains constantwe can never run out of energyhowever, may run out of the type we want the most.11/18/13Exit Task

Explain the energy forms and conversions for a battery operated flashlight.

HOMEWORK: read pages 155-166. Answer #1-5 on page 166. Due Thursday.

11/19/13Entry Task

Consider a pendulum swinging. What is the main energy form at the peak of its swing? What is the main energy form at the lowest point of its swing?

HOMEWORK: read pages 155-166. Answer #1-5 on page 166. Due Thursday.

Todays AgendaPendulum Lab a specific example of KE converting to gravitational PE and back.Design Pendulum Lab(Independent Variable) vs Time of one Pendulum SwingChoose a Question1. How does the length of the string affect the period (time) of one pendulum swing?2. How does added mass affect the period (time) of one pendulum swing?Identify VariablesIndependent VariableDependent VariableHypothesisIf the string is longer, thenbecauseIf the mass is greater, thenbecause

Materialspendulum set up, string, meter stick, stop watch, massesProcedure- student designedDiagram and explain set-upmust have 3 different string lengths OR 3 different masses3 trials for each length or each amount of massExperimental control condition?Explain how to measure the time of the period or pendulum swing.Data Collection student designed data tableRows for 3 string lengths OR 3 massesColumns for 3 trials and Average time calculations17411/19/13Exit Task

Discuss with your group and choose your independent variable. Write down on your exit task. Also, write down your hypothesis.

HOMEWORK: read pages 155-166. Answer #1-5 on page 166. Due Thursday.

17511/20/13Entry Task

List 3 controlled variables every team should have in their pendulum lab procedure.

Run lab176Todays AgendaApproval for Pendulum Lab DesignProcedure - Logical and simple steps to follow (written in ALL comp books)Data Table see my exampleCollect and Record DataFinished? Begin GraphingLINE GRAPHSX axis independent variableY axis dependent variableConditionTrial 1TimeTrial 2TimeTrial 3TimeAverageTimeExperimental Control ConditionCondition 1Condition 2Condition 311/20/13Exit Task

Based on your data, answer your investigative question:1. How does the length of the string affect the period (time) of one pendulum swing?2. How does added mass affect the period (time) of one pendulum swing?HINT: was the time longer, shorter or not affected?HOMEWORK: read pages 155-166. Answer #1-5 on page 166. Due Thursday.

11/21/13Entry Task

Explain the high and low data for your lab. How will you use this data in your conclusion?

Graphs of resultsline graphY-axis dependent variableX-axis independent Conclusion

Further Investigative Question:What independent variable would you investigate next?identify two Weaknesses for your lab as a wholesuggest specific Improvements for your lab as a wholeRestates and conclusively answers the investigative question (discusses whether hypothesis was correct).Gives the range of data, including high data condition and low data condition. Compares the high and low data and explains how the trends support the conclusion.11/21/13Exit Task

We know that all objects in free-fall accelerate at a rate of 9.8 m/s/s REGARDLESS of mass. Use this information to explain why it makes sense that added mass had no affect on the time of swing.

11/22/13Entry Task

Say Something NicePlay JeopardyHand out study guide183Todays AgendaStudy Guide for Unit Test.

11/22/13Exit Task

Trade and GradePlease turn in your exit task sheets11/25/13Week of 11/25 to Wed 11/27Entry Task

NO Written ENTRY/EXIT TASKS THIS WEEK!!Tuesday and Wednesday TESTING. Discussion Questions:What did you study over the weekend? What will you study tonight?Todays AgendaIndividual Work time on Study Guide. Please remain at your seat quietly working. 11/25/13Exit Task

Discussion Questions:What will you study tonight?Which items on the study guide confuse you? What questions do you have?11/26/13 and 11/27/13Entry Task

Prepare for test:You will need a pencil. All other belongings under your desk. TESTINGRemain silent and seated. RAISE YOUR HAND IFYou have a question.Your test is complete. You need a sharpened pencil or eraser.