None of the provided responses accurately describe how a pulley makes work easier. The correct answer should state that a pulley changes the direction of the force needed to lift the object, allowing a person to pull down instead of lifting directly upward. This helps in lifting heavy objects by making it easier to apply force, but the amount of work done remains the same (work = force × distance). If we must choose from your given options, the closest response is:
It decreases the distance over which the force must be applied to lift the object.
However, it's important to note that while pulleys can reduce the amount of force needed by providing mechanical advantage, they do not reduce the overall work done in lifting an object.
1 answer