1. Momentum: Mass or Inertia in motion
  2. Impulse: The change in momentum (Ft)
  3. Elastic Collision: When two objects collide and bounce off each other
  4. Inelastic Collision: When two objects collide and stick together
  5. Conservation of Momentum means that the total momentum before a collision is the same as the total momentum after the collision.
  6. It would have twice as much momentum, because it has twice the velocity.
  7. Losing momentum means an object would slow down.
  8. You could apply a larger force or apply the force for more time.
  9. Momentum in a system is always conserved unless an external (outside) force acts on the system.
  10. Elastic collisions have no permanent deformation, objects don’t stick together, and heat is not generated.
  11. The cannonball will have a larger speed than the cannon, because it has less inertia. Impulse will be the same for both, because the same force is applied to each object for the same amount of time.
  12. The force will decrease because it will take more time to slow down.
  13. The rock that bounces off the ground will impart more force than the rock that does not.
  14. If the time of impact is increased by ten times, then the force on your legs would be decreased by a factor of ten as well.
  15. After crashing, both cars will have the same total momentum as before. The new velocity however will be less than the original velocity of the one car, because the same momentum is trying to move more mass than before.
  16. The basketball would receive more momentum when the bowling ball bounces back, because it applies more force during elastic collisions.
  17. The second meteor piece would move southwest, because the two new pieces need to end up with a net direction of south (due to Conservation of Momentum)
  18. False: perfectly elastic collisions are not common in the real world, because objects will always lose some energy during a collisions.
  19. 60 kgm/s
  20. 5 m/s
  21. 3 kg
  22. The velocity of both objects stuck together would be 2.29 m/s.
  23. The change in momentum would be 80 kgm/s, because the bowling ball would change its velocity 40 kgm/s just by stopping, and then it would change another 40 kgm/s by moving the opposite way.
  24. The two objects would move with a final speed together of 8.3 m/s.
  25. The two players would move with a final speed together of 2.3 m/s.
  26. Superman would move back with speed of 100 m/s.