The gure shows three forces applied to a trunk that moves leftward by 3.48 m over a frictionless oor. The force magnitudes are F1 = 4.50 N, F2 = 9.31 N, and F3 = 3.14 N, and the indicated angle is 8: 60. {3) 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