exciting mechanics puzzle

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Across
  1. 2. distance in/distance out.
  2. 5. Force due to gravity.
  3. 8. Hydrolic cylinders are run by pressure on a _____.
  4. 9. Stored up energy capable of doing work is ______ energy.
  5. 10. The meaning of HP in mechanics.
  6. 12. Heat waste is ______ pollution.
  7. 16. work out/work in.
  8. 18. Mass plus energy is constant because of ________'s law.
  9. 20. The point on which a lever rests or is supported and on which it pivots.
  10. 21. _______cylinders are used to produce very large forces.
  11. 22. _____ arm is the distance from the fulcrum to the force.
Down
  1. 1. _____ mechanical advantage is when the distance in is equal to the distance out.
  2. 3. In machines, the ______ efficiency is usually less than the ideal.
  3. 4. Energy of speed is ______ energy.
  4. 6. machines Machines that have no power supply, like levers, pulleys, inclined planes, etc.
  5. 7. The more massive an object, the more it resists ___________.
  6. 11. When anti-matter and matter meet, they produce _________.
  7. 13. The system of measurement used worldwide.
  8. 14. The result of force out / force in is _________ advantage.
  9. 15. My teacher calls himself.
  10. 17. force/area.
  11. 19. Usually a machine is designed to give more _____ out than you put in.