Question

A 3 kg block is dragged over a rough horizontal surface. If the force of friction acting on the block is 15 N, and the block is moving with a constant velocity, what is the magnitude of the applied force?

A) 15 N
B) 30 N
C) 45 N
D) 60 N

Answer 1

The magnitude of the applied force is 15 N (option A).

Step-by-step explanation:

The magnitude of the applied force can be found using the equation:

Applied force - Frictional force = 0

Therefore, the magnitude of the applied force is 15 N (option A), since the block is moving with a constant velocity and there is no net force acting on it.