Question

In order to keep an object weighing 30N moving at a constant speed along a horizontal surface, a force of 5N is required. What is the force of friction between the surface and the object?

Answer 1

5N

Step-by-step explanation:

Since the object is moving with constant speed , so the net force acting on it must be 0.

The weight of the object is balanced by normal force.

Hence the magnitude of friction will be equal to the driving force that is 5N . it's direction will be opposite to the driving force.

Henceforth the value of frictional force between the surface and the object is 5N .