Question

A man pushes a heavy cart with a force exerted of 250 Newtons to keep it moving at a constant velocity. What is the kinetic frictional force between the cart and the ground?

Select one:
250 Newtons against the cart's motion
Not enough Information.
246 N against the cart's motion
200 N against the cart's motion

Answer 1

It can't be less than 250 N or the cart wouldn't move at all. That means there is only 1 answer. It's between not enough info or 250 N. The answer is 250 N. If it was any more, there would be acceleration.