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Across 3. Energy is exchanged with the space that surrounds it. 5. Has a fulcrum located betwenn the input and out force 6. Work that the machine is designed or intended to do. 9. A type of reaction in which light atomic nuclei combine to form a heavier material. 11. Is made of a lever or pulley connected to a shaft. 14. Multiple pulleys put together 16. Turns a small input force into a large output force by spreading the work out over a large distance. 18. The transfer of energy to a body by the application of a force that causes the body to move in the direction of the force. 19. Unit that work is meaasured in. 20. Is stored in any type of stretched or compress elastic material. 21. Another type of simple machine in the lever family. 22. Made of more than one simple machine. 23. A quantity that measures the rate at which work is done or energy is transferred 25. The point around which the arm of a lever turns 26. A quantity that measures how much a machine multipliles force or distance 27. One of the 6 basic types of machines. 28. Energy cannot be created or destroyed.

Down 1. Another common unit of power. Equals 746 watts. 2. Can potentiall do work because of its position above the ground. 4. Measures the ratio of useful work output to work input. 7. is due to the moving object's motion. 8. Has the fulcrum at one end of the lever arm and the input force at the other end, with output force between them. 10. Impossible to be made machine that supposedly would keep going on forever without any input of energy. 11. SI unit that measures power. 12. Is a simple machine that is an inclined plane wrapped around a cylinder./ 13. if the flow of energy into and out of a system is small enough that it can be ignored . 15. multiplies distance rather than force.Has mechanical advantage less than 1. 17. A single heavy nucleus is split into 2 or more lighter nuclei. 24. Functions like 2 inclined planes back to back.