Physics

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Across
  1. 2. built up speed
  2. 6. another word for speed
  3. 7. the force that pulls objects to the earth
  4. 9. energy in motion
Down
  1. 1. The resistance of two objects touching
  2. 3. the science of universe
  3. 4. unit of force
  4. 5. to push or pull something
  5. 8. everything is made up of this