physics vocab review

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Across
  1. 1. the sum of all the forces acting on one object
  2. 6. a force that resists relative motion between two surfaces in motion
  3. 8. objects act on eachother
  4. 10. something moving from its place or position
  5. 11. quantity having magnitude
  6. 12. any object thrown into space which the only acting force is gravity
  7. 13. quantity having direction
  8. 14. strength or force gained by motion
Down
  1. 2. a push or pull
  2. 3. the rate at which something is moving
  3. 4. an invisible force that pulls objects towards eachother
  4. 5. a tendency to do nothing
  5. 7. a motivating force
  6. 9. increase the rate of speed of something
  7. 14. the amount of matter