1. DAY 33 IT’S A GREAT DAY FOR PHYSICS
TODAY AT A GLANCE:
1) Learn more about physics momentum bar charts and what they describe.
2) Graded CW (groups)
3) Go over answers, apply knowledge
4) Look at the difficult example, see how its graded.
NEXT CLASS: Formal Lab: Collisions

2. TO TAKE WITH YOU
AP Free Response (To do, but don’t worry about fixing/correcting it. Give it 15 minutes, then done)
AP Extra Examples (not collected, due to end of topic)

3. HW?

4. A quick, easy way to show momentum changes
MOMENTUM BAR CHARTS
A quick, easy way to show momentum changes
An easy way to incorporate non- isolated situations. This is where the SYSTEM changes momentum due to a SYSTEM IMPULSE

7. EXAMPLE: AN OBJECT IN A COLLISION
How much impulse did this object receive during the collision?
EXAMPLE: AN OBJECT IN A COLLISION
What can you conclude about the object’s motion and the force in this situation?

8. The object changed direction (Why?)
The force was opposite the initial motion (Why?)

9. EXAMPLE OF A SYSETM CHART

10. Isolated or Non-isolated?
Determine the amount of relative impulse in this situation.
Were both objects going the same speed before the collision?
No! They had the same MOMENTUM, not necessarily VELOCITY

11. Direction of the outside force in this case?
Lets graph their MOMENTUMS together.

12. Lets graph both objects and SYSTEM

14. NOW…. GRADED CW IN GROUPS
Formula sheet only

15. ANSWERS

18. AP QUESTION
Goal: For you to try out a problem (no consequences) as best you can in a limited time period.
Then to see how things are scored