Answer to Question #177052 in Physics for Andu

Question

The frictional force and the driving force parallel to the displacement act on a body simultaneously. What condition must be met for the body to perform uniform rectilinear movements? What is the total work of these forces equal to?

Answer 1

The magnitudes of these forces must be equal for uniform rectilinear motion. The total work of the system is zero because the work done by the driving force is positive, the work done by the force of friction is negative.