Question

A horizontal force of 90.0 N is required to push a 75kg object along a horizontal surface at a constant speed. What is the magnitude of the force of friction. Please show your work I am having troubles.

Answer 1

If the object is moving at a constant speed, acceleration is 0. So:


`F = ma F = m* 0 F = 0`

The resultant force is 0. So the force pushing the object must be equal to the friction force acting, so

Friction = 90 N