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.

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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

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

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

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 1/3 the box’s change of velocity C) The persons gain in velocity is 2/3 the box’s change of velocity

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

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

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

CREATE A TABLE

The CHANGE of MOMENTUM for a single thing is called the IMPULSE. In order to CHANGE the MOMENTUM, you got to apply a FORCE in a given TIME.

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

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:

What is NOT set is the amount of FORCE it takes. If you slow down over a long time: The amount of force needed is SMALL. If you change over a quick time: The amount of force needed is LARGE

LETS SEE IT IN ACTION

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

Showing this through bar graphs:

USING THE CARTS Create this situation

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

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?