1. What is momentum? How do you calculate momentum?
  2. What is impulse? How do you calculate impulse?
  3. Which has more momentum: a car moving at 50 mph or a truck moving at 50 mph? Why?
  4. Which has more momentum: a car moving at 40 mph or the same car moving at 60 mph? Why?
  5. Why is it important to follow through when hitting a baseball or when hitting a golf ball?
  6. Why is it helpful to make car dashboards out of soft material instead a harder material?
  7. A cannonball is fired out of a cannon. How are the forces felt by both objects related?  How are the impulses felt by both objects related?
  8. What happens when there is an elastic collision?
  9. Rank the most momentum from highest to lowest: a baseball moving at 50 mph, a car moving at 45 mph, a worm moving at 0.1 mph, or a building.
  10. A train rolls along a track with considerable momentum. If the mass of the train were tripled (x3) and the speed of the train was kept the same as before, how would the momentum change?
  11. If a cannon shoots a cannonball, why does the cannonball move really fast and the cannon only travels back at a slow speed?
  12. If you drop a 5 kg ball and a 10 kg ball from the same height, how will their accelerations compare to each other? What about their speed?  What about their momentum?
  13. Can you safely jump off a building wrapped in bubble wrap?
  14. If an apple bounces off the ground, will it apply more force or less force than if it did not bounce? Hint: look at the types of collisions we’ve studied.
  15. A moving train crashes into an identical train at rest. If they couple together, how will their combined velocity compare to the original velocity of the first train?
  16. A piece of putty crashes into a bowling ball at rest with 4 kgm/s. After sticking together, how much combined momentum will they have?
  17. How does a rocket ship accelerate up? (Hint: What does it have to do?)
  18. If Superman is at rest in outer space and pushes a giant asteroid away, what will move away faster? Who will have more momentum?
  19. A 5 kg ball is thrown at 20 m/s. What’s the ball’s momentum?
  20. A ball is moving at 18 m/s and has a momentum of 54 kgm/s. What is mass of the ball?
  21. If you drop a bouncy ball and a piece of putty from the same height, which will have a greater impulse when they hit the ground? Why? (Hint: look at types of collisions)
  22. A 5 kg ball moving at 3 m/s crashes into a 6 kg ball which is initially at rest. If they stick together, what would be their combined momentum after the crash?  What would be their speed after the crash?
  23. A model rocket shoots 250 kg of gas downward at a speed of 30 m/s. What speed would the rocket travel upwards at, if it has a mass of 100 kg?
  24. A 2 kg cannonball leaves a cannon at 15 m/s. If the cannon has a mass of 8 kg, how fast would the cannon be moving backward?
  25. A 12 kg car (moving at 3.5 m/s) travels and hits a 2 kg frog (which is not moving to begin with). If they “stick together” what would be their combined speed?
  26. A 5 kg car is moving right at 3 m/s towards a car that is not moving. If after colliding, the 5 kg car stops, then how much momentum will the second car gain?  How much mass would it have if it then traveled at a speed of 6 m/s?
  27. If you push a 120 kg refrigerator with 80 N for 5 seconds, what will be its velocity? Hint: You may need to use multiple equations.
  28. A 20 kg ball moving at 13 m/s to the right hits another 5 kg ball initially stopped. If after the collision, the 20 kg ball moves at 2 m/s, then how much momentum should the 5 kg ball have?
  29. A car stopped by a wall takes 0.3 seconds to stop. The same car at the same speed takes 0.7 seconds to stop when going through a haystack.  How does the impulse of the first car compare to the impulse of the second car?
  30. A ball was hit by a bat with a force of 320 N for a time of 0.4 seconds. What would be the impulse felt on the ball?  What would be the impulse felt on the bat?