You want to move a very heavy table across the room, but no matter how hard you push the table, it does not move. As you push harder and harder, the work done by the static friction
A) increases.
B) stays the same and has a positive value.
C) stays the same and is zero.
D) stays the same and has a negative value.
E) decreases.

Question

Quizplus · Accepted Answer

The work done by static friction is zero because there is no displacement of the table. Work is defined as the force applied on an object times the displacement of the object in the direction of the force. If there is no movement, displacement is zero, making the work done by static friction zero as well.

You Want to Move a Very Heavy Table Across the Room