fun physics

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Across
  1. 3. Newton's first law is known as
  2. 4. A push or a pull
  3. 5. An object in motion stays in ......
  4. 8. Produces a change in motion
  5. 9. For every action there is an opposite and equal ......
Down
  1. 1. Acts opposite to the direction of the motion
  2. 2. Force=mass*_____
  3. 6. An object at rest stays at ....
  4. 7. pulls a ball back to earth