Question

Using a horizontal force ` 200N`, we intend to move a wooden cabinet across a floor at constant velocity. What is the frictional force that will be exerted on the cabinet?

Answer 1

Since the wooden cabinet is to be moved at constant velocity, this mearns that the whole force of 200 N will be used to overcome the force of friction (because no force is spent on producing acceleration in the cabinet). Thus, the force of friction exerted on the cabinet will be equal to the force applied, which is 200 N.