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Across 4. unit of energy; work done by 1000 watts operating for one hour 6. the force needed to move a load 8. a doorknob is an example of this simple machine 12. basic mechanical device used to apply force 14. an object being moved or lifted 17. has the fulcrum in the middle, like scissors 20. unit of work equal to one newton-metre 21. simple machine that exerts a large force on a load but requires little effort; hammer 22. distance between the fulcrum and the load 24. the load is between the fulcrum and the effort; wheelbarrow 25. ramp, switchback and screw are all examples

Down 1. a pulley that moves with the load, reducing required effort 2. percentage of input work that is converted to output work 3. the point on which a lever rests or pivots 5. force X distance 7. the internal energy of a system 9. the effort is between the fulcrum and the load; baseball bat 10. the capacity to do work 11. a simple machine that allows us to move a load a large distance with a short effort distance; fishing rod 13. the work done when one newton of force is used for one metre 15. attached to a structure; changes direction of force 16. the distance between the fulcrum and the effort 18. balance, steadiness 19. a push or pull exerted on an object 23. a simple machine; grooved wheel wrapped with rope or cable