Forces and simple machines

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Across
  1. 2. Something that can be lifted up and carried
  2. 4. A machine that is made up of 2 or more simple machines
  3. 7. A sloping surface that makes it easier to move objects to a higher or lower place
  4. 11. It is a simple machine used to lift a heavy load with less effort
  5. 13. A push or a pull that changes the motion of an object
  6. 14. A simple machine used to apply huge force with little effort, also used to put things together
  7. 15. An invisible force that pulls us to earth
  8. 16. A pulley consists of a wheel and a ...
Down
  1. 1. The top or outside part of something, not the middle
  2. 3. The action or process of moving or of changing place or position; movement
  3. 5. A machine that has a few or no moving parts
  4. 6. It is used to split or raise objects
  5. 8. Hard physical or mental work
  6. 9. A state when objects stay at rest or keep moving in the same way unless an outside force acts on them
  7. 10. A scientist who discovered gravity
  8. 12. It is a fixed point in a lever
  9. 13. the force which is produced when one thing rubs against another