Forces and work

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Across
  1. 2. It pulls objects toward the centre of teh earth.
  2. 4. A type of force.
  3. 6. Helps to prevent ________.
  4. 7. The result of one surface moving over another.
  5. 8. Physically touching.
Down
  1. 1. Having the properties of a magnet.
  2. 3. Force which keeps an object floating on air or water.
  3. 4. Movement outwards.
  4. 5. The opposite of ___.
  5. 7. Strength exerted to cause a physical action.