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Energy work and machines

D'Avy Physical Science

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1.machine made up of a combination of 2 or more simple machines
4.equals the output work divided by the input work; expressed as a percentage
6.rate at which work is done; equal to the work done divided by the time it takes to do the work; measured in watts
8.a machine that does work with only one movement; includes the inclinde plane, wedge, screw, lever, wheel and axle, and pulley
11.simple machine that is a flat surface, sloped surface, or ramp
13.force exerted by a machine
14.simple machine made from a grooved wheel with a rope or cable wrapped around the groove
2.number of times the input force is multiplied by a machine; equal to the output force divided by the input force
3.simple machine consisting of an inclined plane that moves; can have one or two sloping sides
5.simple machine that is an inclined planed wrapped around a cylinder or post
7.simple machine made from two circular objects of different sizes that are attached and rotate together
9.simple machine consisting of a rigid rod or plank that pivots or rotates about a fixed point called the fulcrum
10.force exerted on a machine
12.done when a force exerted on an object causes that object to move some distance; equal to force times distance; measured in joules (J)

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