Laws of motion

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Across
  1. 3. in motion an object in motion will stay in motion unless acted upon by an unbalanced force
  2. 6. friction is the resistance of motion when one object rubs against another
  3. 7. Force when both opposite sides are equal in size
  4. 9. at rest an object at rest stays at rest unless acted upon it
Down
  1. 1. the rate of change of velocity
  2. 2. something that remains in motion or in a straight line unless acted upon
  3. 4. a push or pull on an object
  4. 5. Force when both opposites sides are different in size
  5. 8. force the sum of all the forces that act upon an object