Gravity and Motion

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Across
  1. 2. When unbalanced forces act on an object.
  2. 5. When one object bumps into another.
  3. 7. Newton's first law.
  4. 9. when an object has no force other than gravity acting on it.
  5. 10. The planets in the Solar System _________ the Sun.
Down
  1. 1. The gravitational force of an object decreases as the _________increases.
  2. 3. When an object speeds up.
  3. 4. The force that keeps the planets in orbit around the Sun.
  4. 6. The amount of an object(NOT WEIGHT).
  5. 8. the amount of gravity pulling on a body of mass.