Unbalanced and balanced force

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Across
  1. 2. two forces acting in opposite directions on an object, and equal in size
  2. 4. the state in which opposing forces are balanced
  3. 5. forces that cause a change of an object
  4. 6. SI unit of force
Down
  1. 1. change in velocity
  2. 3. strength or energy as an attribute of physical action or movement