1. TODAY
Today's Goal: 1) New topic: Impulse and Momentum. Lets start learning about Impulse 2) Apply our idea to collisions through graphs. Homework: Watch the video, LEARN

2. IN SUMMARY SO FAR:
Momentum is the ‘motion of an object’ p = mv.
It is transferred between things
In an isolated system, the system amount wont change, just redistributed

3. SO IN AN ISOLATED SYSTEM:
The total amount of momentum before and after an event is the same!

4. Momentum : Its like the overall motion of an object. Has direction.
Idea
In Words
In Equation
Units
How its used
Momentum, Symbol is p
The motion of objects which involves both the mass and velocity.
p = m*v
Kg*m/s or a N*s
In systems where two objects interact, momentum is conserved
Momentum : Its like the overall motion of an object. Has direction.

5. Two Things Hitting:
1) Where does the car get the momentum to move from?

6. Two Things Hitting:
2) How does the change in momentum of the heavy truck compare to that of the car?

7. Two Things Hitting:
3) How does the change in velocity of the heavy truck compare to that of the car?

8. Two Things Hitting:
LETS MAKE A TABLE TOGETHER

9. LETS TRY SOME TEMPLATE

13. The CHANGE of MOMENTUM for a single thing
In order to CHANGE the MOMENTUM,

14. The CHANGE of MOMENTUM for a single thing is called the IMPULSE.
It can be found through two ways: J

15. SO FOR A CAR STOPPING:
The amount of MOMENTUM it will change by is fixed:
A 2000kg car going from 20m/s to rest is a SET amount of IMPULSE:

16. What is NOT set is the amount of FORCE it takes.
If you slow down over a long time:
If you change over a quick time:

17. LETS SEE IT IN ACTION

18. The CARS had different FORCES with the same CHANGE in MOMENTUM.
They had DIFFERENT FORCES from the same IMPULSE.

19. Showing this through bar graphs:

20. How can you tell this is an isolated system
How can you tell this is an isolated system? Lets turn it into a non-isolated one

23. How does the impulse of the person compare to the impulse of the box?
A) The impulse of the person is larger than the impulse of the box
B) The impulse of the person is equal to the impulse of the box
C) The impulse of the person is less than the impulse of the box

24. How fast is the person going after the collision? Which idea is correct
A) The persons change of velocity is equal to the box’s change of velocity
B) The persons gain in velocity is 2/3 the box’s change of velocity
C) The persons gain in velocity is 1/3 the box’s change of velocity

25. How does the velocity of the SYSTEM (or CENTER OF MASS) change?
A) The system does not change velocity because no outside force occurs
B) The system loses velocity because the box goes backwards
C) The system gains velocity because the heavier person gets faster

27. WHICH OF THESE…
Would be the momentum of the system during the event?
Would be the rate of change of momentum of the system?
Would be the momentum of the box during the event?
Would be the momentum of the person during the event?