Question 27 (2.5 points) A 65.0 kg box is at rest on a rough horizontal surface. A man pushes horizontally on the box, first with a constant force where the box does not move. After some time, the pushing force is increased to 650 N, and then finally he stops pushing and loses contact with the box. If the coefficient of kinetic friction during phase B is μk = 0.20, what is the acceleration of the box as it slides during phase B?