1. Momentum and Impulse 3/24/15

2. Free fall equations ● Final velocity=acceleration*time ● Final distance= 1/2 * acceleration*(time^2)

3. Gravity practice ● If a man falls out of a plane and falls for 5 seconds what is his final position? ● Remember g=9.81m/s^2

4. Gravity problem ● For the same man what is his final velocity?

5. Gravity and free fall ● What could help lower this man’s velocity as he is travelling downwards?

6. Momentum ● the quantity of motion of a moving body ● We measure this as p(momentum)=m(mass)*v(velocity)

7. Momentum ● What do you think momentum means? ● Where can you see momentum in your daily life?

8. Units of momentum ● If we multiply mass and velocity what do you think the units of momentum will be?

9. Units of momentum ● The units of momentum are kg*m/s

10. Impulse ● The force applied to an object over time. ● J=F*(T2-T1)

11. Impulse ● Egg drop interactive

12. Conservation of momentum ● The amount of momentum in a system will always be the same unless acted upon by an outside force.

13. Conservation of momentum ● When two objects collide their momentum at the beginning will be the same after the collision

14. Car at a stop light ● Think of a car at a stop light. If a car comes from behind and hits it what happens?

15. Physics be hind the car crash ● Momentum of both cars before ● Momentum of cars after

16. Group Problem ● In groups solve the question on the back board

17. Collision lab