Question

A construction worker uses a pulley system to lift a block. What is one of the purposes of the pulley system?(1 point)
Responses

to reduce the time needed to move the block
to reduce the time needed to move the block

to increase the energy needed to move the block
to increase the energy needed to move the block

to change the direction of the force needed to move the block
to change the direction of the force needed to move the block

to increase the force needed to move the block

Answer 1

The correct response is: **to change the direction of the force needed to move the block.**

Pulleys are primarily used to allow a person to lift heavy objects by pulling down on a rope, which changes the direction of the force applied.