The MA of a lever is 4. If you have to lift the object up 20 cm, how far will you have to pull down?

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Explanation:

The mechanical advantage of a machine is 4. ... Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 4 means that for example if you apply 100 N then your machine will multiply that force and generate 400 N.

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