Question

A mechanic wants to use a compound pulley to lift a go-kart from the ground to work table, a distance of 1.2 meters. Without the pulley, 1,620 Newtons of force would be needed to lift the go-kart. If the pulley has a mechanical advantage of 4, how much force must the mechanic expend?

Answer 1

To find the force the mechanic must expend, we need to use the formula:

input force * mechanical advantage = output force

Let x be the force the mechanic must expend. Then:

1,620 N * 4 = x

Simplifying:

6,480 N = x

Therefore, the mechanic must expend 6,480 Newtons of force to lift the go-kart using the compound pulley.