A 50.0 kilogram box is at rest on a horizontal floor where µk = 0.30.
a) A force of 300 Newton is needed to break the box free. Evaluate what is the coefficient of static friction?
b) Evaluate how much force is needed to move the box at a constant speed of 4.31 m/s.
c) Find what would be the acceleration if a force of 500 Newton is applied to the box?