Newton's choice board crossword

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Across
  1. 3. equal forces acting in opposite directions
  2. 5. the total force acting on an object
  3. 6. the rubbing of one body against another
  4. 8. how we measure force
  5. 9. a push or a pull
Down
  1. 1. forces that are not equal
  2. 2. the act or process of moving faster or happening more quickly
  3. 4. an acting force and a force that happens because of the acting force
  4. 7. a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force
  5. 9. newton's 2nd law