Crossword Puzzle on Momentum and Forces

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Across
  1. 3. The product of an object's mass and velocity
  2. 8. The unit of measurement for force in the International System of Units
  3. 9. Forces that produce a change in motion
  4. 11. A measure of speed in a given direction
  5. 12. Law of __________ of Momentum
Down
  1. 1. A vector quantity that tends to produce an acceleration of a body
  2. 2. How fast an object is going with respect to an object or direction
  3. 4. The force that opposes motion between two surfaces
  4. 5. The natural force of attraction exerted by a celestial body
  5. 6. This type of friction occurs when one surface rolls past another
  6. 7. The alternate force of a push
  7. 10. A property of matter equal to the measure of an object's resistance to changes in its motion