A force pushes a block along a horizontal surface against a force of friction _f.If the block undergoes a displacement s at constant velocity,the work done by the resultant force on the block A)is equal to the work done by the force of friction _f B)is given by W = · C)increases the kinetic energy of the block. D)increases the potential energy of the block. E)is zero.

Question

Quizplus · Accepted Answer

When an object moves with constant velocity, its kinetic energy does not change. This means that the work done by the resultant force is equal and opposite to the work done by the force of friction, and the net work done on the object is zero. Therefore, the correct answer is E.

A Force Pushes a Block Along a Horizontal Surface