Can someone please help me solve this question below. 1. The problem statement, all variables and given/known data How much force is needed to push a 20 kg box across a floor at a constant speed of 0.5 m/s [forward] against a frictional resistance of 4 N? 2. Relevant equations Fnet = m.a 3. The attempt at a solution Since the velocity is constant, the acceleration will be 0. If that is correct the net force is going to be 0, which doesnt make any sense.