Question

Use the image of the pulley to answer the question.

An illustration shows a system of two pulleys lifting a block.

Lifting the weight without a pulley requires a force of 400 newtons over a distance of 4 meters. How do these values change when the pulley is applied?

(1 point)
Responses

The force decreases, while the distance increases.
The force decreases, while the distance increases.

The force increases, while the distance decreases.
The force increases, while the distance decreases.

Both the force and the distance increase.
Both the force and the distance increase.

Both the force and the distance decrease.

Answer 1

The force decreases while the distance increases.

With two pulleys the mechanical advantage is 2, so required force = 400 N / 2 = 200 N. Work is conserved (neglecting friction), so distance = (400 N × 4 m) / 200 N = 8 m.