Physics

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Across
  1. 4. Newton's first law of motion
  2. 6. The rate at which an object moves per unit of time
  3. 7. How much motion an object has
Down
  1. 1. another word for speed
  2. 2. mass x acceleration = ?
  3. 3. another word for length
  4. 5. how much matter is in an object