Using a lever to move a rock reduces the force a person must exert.What does it do to the work the person must do?
A)it reduces the work also
B)the work stays the same
C)the work increases
D)none of the above

Question

Quizplus · Accepted Answer

The work is equal to the force required to lift the rock multiplied by the distance it is moved. Although using a lever reduces the force required, it also increases the distance the person must move the lever. Therefore, the work required stays the same.

Using a Lever to Move a Rock Reduces the Force