Newton's Laws and Momentum

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Across
  1. 1. Means change in momentum.
  2. 3. Impulse, or change in momentum, is equal to the ________ under a force-time graph.
  3. 4. Newton’s 2nd law says that the force on an object is equal to the ________ of change of momentum.
  4. 5. In an explosion, the total momentum before and afterwards is often this.
  5. 7. Elastic collisions are sometimes called this.
  6. 8. Inelastic collisions are sometimes called this.
  7. 9. In any collision, momentum is always ________.
  8. 11. In any collision, the ________ energy (i.e. all forms) is always conserved. This word is used twice in the crossword !
  9. 12. a collision when kinetic energy IS conserved
Down
  1. 1. a collision when kinetic energy IS NOT conserved
  2. 2. Newton’s 3rd law: if object A exerts a force on object B, then object B exerts an equal force on A but in the ________ direction.
  3. 6. Impulse is equal to force x ….
  4. 10. momentum is defined as mass x ….