1. The problem statement, all variables and given/known data A man pushes a heavy box. The mass of the box is 100kg. There is friction between the man and the floor; the frictional force is 150N. As the mas pushes hard, the box accelerates with acceleration 0.3m/s/s. Calculate the force F exerted by the man on the box. 2. Relevant equations F = ma 3. The attempt at a solution Does the man need to at least exert 150N to overcome the force of friction? I don't know how to attempt the problem.