Forces Crossword

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Across
  1. 3. the force opposing weight on a solid surface is the ______ contact force
  2. 5. the unit used to measure force
  3. 8. a unit used to measure mass
  4. 12. what streamlining attempts to reduce
  5. 13. mass times gravitational field strength = ?
Down
  1. 1. a liquid that can be used to reduce friction
  2. 2. when forces are balanced, the motion of the object is ?
  3. 4. for an object to change speed or direction, forces need to be ?
  4. 6. the type of force that makes a compass work
  5. 7. when two forces are in the opposite direction and have equal strength
  6. 9. the type of force exerted by the Earth on small bodies in space
  7. 10. distance divided by time = ?
  8. 11. the type of force that occurs when one object moves over another