Energy and Gravity

What does the Law of Conservation of Energy say?

What are potential energy and kinetic energy?

DO NOW MONDAY

Explain the Law of Conservation of Energy. Explain the direction and sequence of energy

transfer.

Learning Targets

Potential energy: stored energy Kinetic energy: energy of motion

Potential energy can be transformed into kinetic energy and vice versa as things move and stop or speed up and slow down.

Potential and Kinetic Energy

https://www.youtube.com/watch?v=7K4V0NvUxRg&list=PLNP7mXrp0yBJtpHIMpRBEZ9rxTfZW0kae

Potential and Kinetic Energy

On a roller coaster, potential energy is transformed into kinetic energy and back into potential energy as the coaster moves along the track, up and down the “hills”.

Roller Coasters

Roller Coasters

The higher the coaster (or anything ) is off the ground, the more potential energy it has.

This is called gravitations potential energy. The more or faster something is moving, the

more kinetic energy it has.

Roller Coasters

Roller Coasters

Identify which letter(s) in the picture indicates where a coaster car would have: The greatest potential energy The greatest kinetic energy Transformation from potential to kinetic energy Transformation from kinetic to potential energy

Roller Coasters

https://www.youtube.com/results?search_query=kinetic+and+potential+energy+and+roller+coasters

Roller Coasters

Requirements: 100 points possible Successful (must travel entire course without stalling) 25 points 2 hills (at least) 20 points 1 corkscrew or loop 10 points Name of coaster (no copycats) 5 points Initial design drawing (draw at bottom of this page) 10 points Final drawing (on back of this page)10 points

Drawing should be accurate and look like your coaster.Be sure to indicate measurements of your coaster such asheights of hills and distance between hills

Indicate on your drawing the following 20 point (You can indicate each point with a letter on your final drawing)

Point of greatest potential energyPoint of greatest kinetic energyPoint(s) where potential is changing to kineticPoint(s) where kinetic is changing to potential

Roller Coasters

Explain the energy transformation that is happening in the picture below.

DO NOW TUESDAY

Explain the Law of Conservation of Energy. Explain the direction and sequence of energy

transfer.

Learning Targets

Give a definition of gravity in your own words.

DO NOW WEDNESDAY

2.1 Explain gravity’s effects on different objects.

2.2 Describe the relationship between mass and gravitational force.

2.3 Describe the relationship between distance between objects and gravitational force. (different planets)

Learning Targets

Use the textbook (pages 58-61) to answer the questions about gravity below in your notebook on page . Be sure to write your answers in complete sentences.

1. What is the definition of gravity? 2. What is true about the rate at which all objects on

Earth free fall due to gravity? 3. Explain what air resistance does to the rate at

which objects fall. 4. What two things does gravity depend upon? 5. Explain how mass affects gravity. 6. Explain how the distance between two objects

affects gravity.

Gravity

The force that pulls objects toward each other.

A force that acts between any two objects in the universe.

Gravity

All objects free fall at the same rate due to gravity.

This rate is 9.8 m/s2

Acceleration Due to Gravity

Drop 1: Watch the piece of paper and the ball drop.

Drop 2: Watch the paper wad and the ball drop.

What was different?

Why do you think there was a difference between the first drop and the second drop?

Gravity Demonstration

Is a force that acts against gravity

Is a force that acts more on lightweight objects with more surface area, making them fall slower than expected.

Can make objects fall at different rates

Air Resistance

Even though gravity makes things fall with same acceleration (at the same rate), air resistance can cause different objects to fall at different rates and hit the ground at different times.

Lightweight objects with more surface area have more air resistance pushing against them and so fall slower and hit the ground later than heavy objects with smaller surface area.

Gravity and Air Resistance

Can you explain the Gravity demonstration with the paper and the ball better now?

Gravity Demonstration

Factors Affecting Gravity

https://www.youtube.com/watch?v=ncu2NfiaRDk

After watching the video, answer the questions on the sheet provided.

Bill Nye’s Thoughts on Gravity

1. List the two things that can affect gravity.2. Explain how each of these things affects

gravity.

DO NOW FRIDAY

2.1 Explain gravity’s effects on different objects.

2.2 Describe the relationship between mass and gravitational force.

2.3 Describe the relationship between distance between objects and gravitational force. (different planets)

Learning Targets

Study for gravity quiz.

QUIZ EXPECTATIONS1. QUIET2. Do your best. (Eyes on own paper.)3. Finished? (Turn your quiz over and write a

note, draw a picture for Mrs. Dyer on the back.)

DO NOW MONDAY

2.1 Explain gravity’s effect on different objects. 2.2 Describe the relationship between mass and gravitational

force. 2.3 Describe the relationship between gravitational force and

the distance between objects. (different planets) 2.4 Identify unit used to measure gravitational force.

3.1 Describe the relationship between motion and energy. 3.2 Explain the difference between potential and kinetic

energy. 3.3 Describe how an object’s position affects potential energy.

(Relate gravity to potential energy) Product Target: Design a functional roller coaster that

demonstrates potential and kinetic energy at various points.

Learning Targets

1. Finish and Turn in Roller Coaster drawing with measurements and points labeled:

Point of most potential energy Point of most kinetic energy Point(s) where kinetic is transforming to potential Point(s) where potential is transforming to kinetic

2. Sign out a ChromeBook and complete Gravity Pitch Gizmo and Gravity Force Lab. (See my teacher website for links to these activities.)

AGENDA MONDAY

Login in:kahoot.it

Learning Target:I can illustrate mastery of energy and gravity learning targets on a written test.

DO NOW TUESDAY

DO NOW THURSDAYLabel a sheet in the back of your notebook with each of the following and leave space to write answers.

Test 3 AnalysisQuestions I missed:

Targets I missed:

How much I studied:

Why I studied this much:

1. Test Analysis2. Redo Test and/or open response, if necessary3. Write an article summary:Read the article and write a 3 paragraph article summary according to the instructions below:

Paragraph 1: Paragraph 2: Paragraph 3:

THURSDAY AGENDA