A stalled car is being pushed up a hill by three people,and it is moving at a constant speed.The net force on the car is
A)zero.
B)in the same direction of the car's motion.
C)in the opposite direction of the car's motion.
D)None of the above

Question

Quizplus · Accepted Answer

If the car is moving at a constant speed, then the net force on the car must be zero. This means that the force being exerted by the three people pushing the car up the hill must be equal and opposite to the force of friction acting against the car. Therefore, the net force is balanced and equal to zero.

A Stalled Car Is Being Pushed Up a Hill by Three