Newton's Laws Crossword puzzle

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Across
  1. 4. the force of attraction between all masses in the universe
  2. 7. equal forces acting on an object that combine and form a net force of zero
  3. 8. A measure of the amount of matter in an object
  4. 11. occurs when two solid surfaces slide over each other
  5. 13. The tendency of an object to resist a change in motion
  6. 14. For every action force there is an equal and opposite reaction force
  7. 15. friction that occurs when an object rolls over a surface
  8. 16. Friction that acts on objects that are not moving
  9. 17. Change in velocity divided by the time it takes for the change to occur
  10. 18. the force or speed with which something moves (mass x velocity)
  11. 19. a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.
Down
  1. 1. the scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force
  2. 2. Fluid friction acting on an object moving through the air
  3. 3. Force equals mass times acceleration
  4. 5. The greatest velocity a falling object can achieve
  5. 6. friction that occurs as an object moves through a fluid
  6. 9. Forces that produce a nonzero net force, which changes an object's motion
  7. 10. A push or pull exerted on an object
  8. 12. The sum of all forces acting on an object