You slide a 325-N trunk up a 20.0°inclined plane with a constant velocity by exerting a force of 211 N parallel to the inclined plane. (a) What is the component

of the trunk's weight parallel to the plane? (b)What is the sum of your applied force, friction, and the parallel component of the trunk's weight? Why? (c) What is the size and direction of the friction force? (d) What is the coefficient of friction?