Alan will use a compound pulley to lift a crate from the floor of his garage to a storage shelf. The shelf is 5 meters above the floor. Alan pulls 10 meters of rope to lift the crate. Which statement is correct? (1 point)

Question

Alan uses one-third the force he would have needed without the compound pulley

Alan has to use three times the force he would have used without the compound pulley

A two wheel compound pulleys will double the weight of the object Alan is lifting.

Alan uses one-half the force he would have needed without the compound pulley

Answer 1

To determine the correct statement regarding the use of a compound pulley, let's analyze the situation.

When using a compound pulley, the mechanical advantage allows you to lift a load with less force compared to lifting it directly. The mechanical advantage is determined by the number of rope segments supporting the load.

In Alan's situation, he pulls 10 meters of rope to lift a crate 5 meters. This scenario indicates a mechanical advantage of 2, meaning the force needed is halved.

Therefore, the correct statement is:

Alan uses one-half the force he would have needed without the compound pulley.