The figure shows three forces applied to a trunk that moves leftward by 3.43 m over a frictionless floor. The force magnitudes are F1 = 4.87 N, F2 = 9.14 N, and F3 = 3.06 N, and the indicated angle is theta = 60 degree.
(a) During the displacement, what is the net work done on the trunk by the three applied forces, the gravitational force, and the normal force?
(b) Is there a net transfer of energy to or from the trunk?
(c) Does the kinetic energy of the trunk increase or decrease?
