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2 October, 13:11

Calculate the mechanical advantage of a block and tackle that requires a force of 20N to lift a rock that weighs 40N one meter off the ground

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  1. 2 October, 13:15
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    The mechanical advantage is

    (output force)

    divided by

    (input force).

    If you can lift a 40N rock with a 20N force, then whatever you're

    using to do the job has a mechanical advantage of (40/20) = 2.

    The distance you lift the rock off the ground is irrelevant.
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