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Simple Machines

•Simple machines make work easier by multiplying, reducing, or changing the direction of a force.

•Without the use of simple machines the amount of work input is never greater than the amount of work output.

•Pulley system requires the least amount of work, because an example is if you lift 75 newtons but use a pulley, then your only using 37.5 newtons of force.

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MAP review

By how___ard