Force and friction

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Across
  1. 2. a force that stops moving objects
  2. 6. there are advantages and disadvantages of friction
  3. 7. an apple falling off a tree is _____ force
Down
  1. 1. friction in fluids
  2. 3. the moon orbiting around the earth is ___ force
  3. 4. a unit of force
  4. 5. push or a pull