Biology

Coco

28 April, 12:19

Farmer Bob decides to use a compound pulley to raise a box up to the top of his barn.

What is the purpose of using a simple machine in this case?

A) to reduce the amount of friction

B) to reduce the distance the box has to travel

C) to reduce the amount of work needed to lift the box

D) to reduce the amount of force needed to lift the box

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