How does a pulley assist in lifting objects?

A pulley assists in lifting objects primarily by changing the direction of the force applied to lift the object. When a pulley is used, pulling down on the rope or cable causes the load to be lifted upward. This directional change can make it easier for a person to lift heavy objects since they can use their body weight and gravity to assist in the lifting process. By pulling down, the force the person exerts translates directly into an upward motion for the load, allowing for a mechanical advantage in lifting it.

The other options do not accurately represent the function of a pulley. For instance, a pulley does not increase the weight of the object; rather, it allows the same weight to be lifted more efficiently. It also does not simply hold the object in place, as that is not the main purpose of a pulley system. Lastly, while pulleys can be configured in various ways, they do not inherently add various angles of motion; they serve primarily to change the direction of applied force.