energy,power& Mechanics

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Across
  1. 2. a rigid bar resting on a pivot, used to help move a heavy load
  2. 5. energy energy from the wind
  3. 10. energy energy from the sun
  4. 11. the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
  5. 12. a toothed wheel that connects to more toothed wheels to make power
Down
  1. 1. energy energy form the earth
  2. 3. energy from running water
  3. 4. the part of physics concerned with the mechanical properties of gases
  4. 5. activity involving effort to achieve result
  5. 6. energy the energy released during fission or fusion
  6. 7. energy organic material that is turn into energy
  7. 8. energy energy from the tides
  8. 9. energy as an attribute of movement