Question

The man pushes a refrigerator across carpeting. The frictional force of the carpet is equal and opposite to his applied force. Describe the net force of the refrigerator and its direction.
A. The net force is stronger in the direction of the applied force, so the refrigerator accelerates to the right.
B. The net force is stronger in the direction of friction, so the refrigerator accelerates to the left.
C. The net force is zero, so the refrigerator's motion does not change.

Answer 1

C. The applied force and friction are equal in magnitude and opposite in direction, so they sum to zero. The net force is zero, so the refrigerator has zero acceleration and its motion does not change (it will continue at the same velocity, possibly zero).