A force P pulls on a box of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the box in this situation. W represents the weight of the box. Fn represents the normal force on the box, and f represents the frictional force. \FN ... P = 160 N f = 80 N 60 W = 196 N %3D Which statement best describes the motion of the crate? A The box must be moving with constant velocity. B The box may be either at rest or moving with constant acceleration. The box may be either at rest or moving with constant velocity. D The box must be at rest. E) The box must be moving with constant acceleration.

A force P pulls on a box of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the box in this situation. W represents the weight of the box. Fn represents the normal force on the box, and f represents the frictional force. \FN ... P = 160 N f = 80 N 60 W = 196 N %3D Which statement best describes the motion of the crate? A The box must be moving with constant velocity. B The box may be either at rest or moving with constant acceleration. The box may be either at rest or moving with constant velocity. D The box must be at rest. E) The box must be moving with constant acceleration.