Monday PS

Yellow Book Lab

Tests

• Some are graded, not all

• Hand back Wednesday-ish

Essential Question

• How do we describe what happens in a collision in terms of Newton’s Laws of Motion

P14 in yellow book

• Describe the forces pushing/pulling on Jaime’s during collision.

• Draw a free-body diagram

Free Body Diagram of Jaime

Upward force of seat

Weight

Friction and seat beltForward force of seat

P14

• Why is she having x-rays and an EKG

• What is the use of an X-ray?

• What is the use of an EKG?

Use of X-rays

Use of EKG

• Echocardiograms

MRI

• Magnetic Resonance Imagery

The rest of the class

• Will be spent in groups creating clay crash dummies to be used for observation

Goals:

To connect the laws of motion to auto accidents

To understand the result of using different types of seat-belts in crashes

Car Crash Lab

• Each person is responsible for completionof pages 15-22

Write the predictions

BEFORE

Do and record the observations

Then

Answer any questions in book

Task #1

• Create and record motion of body/head on car

Task #2

• Create, record motion of the heads on bus

Warning

• Any horseplay or making of inappropriate anatomical parts for the clay figures will result in you spending the rest of the time in room 240 today and a zero for the missing pages of work

Group Selection

• 3-5 people per group

• My choice

Materials that need to be acquired by each group

• Ramp• Wooden Car• Clay• Scissors• 3-4 straws• 4-6 world history textbooks (by back window)• Ribbon (pick up from teacher when needed

• Same on the floor for ramp, start ramp from a seat

Crash Simulation II

• Jamie goes hurtling down the ramp into a book barrier

• Barrier = 4-6 books 1-2 feet away from bottom of ramp.

• No seat belt

Crash Simulation #3

• Jamie goes hurtling down the ramp into a book barricade with different kinds of seat-belts

• Only 2 width’s of seat-belts available:– Wire– Ribbon

• Do first part with shoulder harness

• Do the second part without shoulder harness

Last page (22)

• 3 simulations– Try simulation 1 between 2 people in group– Discuss and answer other 2 simulations

Discussions of results

• Going over answers to the questions

Comparing forces in contact

• Two people leaning against each other

Neither is moving

How do the forces each exerts on the other compare?

Sit #2 Fast moving object crashing into stationary object

• What are the action and reaction forces?

• How do they compare?

Objects in motion

• What are the action and reaction forces?

• How do they compare?

Comparison of action-reaction forces in different situations

Make predictions for each situations on page 23-25

P27

• Write the third law in the scroll

• Answer the question below the scroll

P29

• On the moon, the acceleration due to gravity is 1.7m/s2

• Complete part 1 and part 2

• Inertia is measured by mass

P30

• Finding the weight of an object

• Weight = ___________ x ___________

• Weight = mass X acceleration due to gravity

Complete part IV on page 30

Homework in Yellow Book

• Page 35-37 problems 3-8

Thursday

• Go over 29, 30, 35-37

• Finish the yellow book

• Seat-belts debate

• Seat-belt assignment

• Grades and hand-back tests ?

Sum up• How do the forces exerted on the car and bus from the collision

compare?

• How does the mass of the car compare to the mass of the bus?

• Which object (Bus, Car) will accelerate more because of the applied force from the accident?

• How can the motion of the students on the bus be related to the 1st and 3rd law?

• Knowing about action-reaction forces, why was there more damage done to the car?

P45

• Write all three laws of Newton

Seat Belts

• Did Jaime’s seatbelt help or harm her?

• Would seatbelts have helped or harmed the students on the bus for this accident?

• Are there other types of accidents with school buses that would have changed your answer in the above question?

The Seatbelt issue

• Read pg 46-51 (includes some articles on the issue of seat-belts on buses

• Answer the first 3 questions on page 46

• Use the internet to see if any district or states requires school buses to have seatbelts– get specifics

• Determine if other buses are required to have seatbelts (greyhound…)

Seatbelt Position Paper

• Decide for yourself whether there should be a law that mandates that all school buses have seatbelts for each student.

• One-two pages Typewritten, (handwritten will lose points)

• Provide some evidence for both sides of the argument. Indicate the source of the evidence in the paper

• Use the laws of Newton correctly to back up evidence• Bring up other issues (Security, cost…) in addition to

help argue your position• Grammar, Paragraph structure will count as well as

strength of argument, evidence

Paper, Yellow Booklet Due Next Thursday

October 19

Tests

• For most classes, the tests are graded

• Those few individuals that have not taken the test will do a different version on Monday