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Work, Power, & Machines

Alison Davis

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1.fixed point that a lever pivots on
5.P = W/t
6.rate at which work is done or energy is transferred
8.pulley attached to object being moved
9.when a force causes an object to move in the same direction as the force
10.number that tells how many times a machine multiplies force
13.unit used to express power
14.unit of work
17.energy of something moving
19.applying this doesn't always result in work being done
20.the work done BY a machine
21.when fixed and moveable pulleys are used together
22.simple machine that consists of a wheel over which a rope, chain, or wire passes
23.the work done ON a machine
2.a machine made of more than one simple machine
3.a comparison of a machine's work output with the work input
4.simple machine that consists of an inclined plane wrapped around a cylinder
7.W = F x d
8.device that makes work easier by changing the size or direction of the force
11.simple machine made of two circular objects of different sizes; the wheel is the larger of the 2
12.simple machine that is a straight, slanted surface which facilitates the raising of loads
15.simple machine that consists of a bar that pivots at a fixed point
16.pulley attached to something that doesn't move; example: elevator
18.simple machine made of two inclined planes that move, often used for cutting

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