5. NET WORK and KINETIC ENERGY A monkey was pushing a sofa left with a 21-N force, when you started pushing it right with a 47-N force. The sofa slides a distance of 1.7-m to the left, against 10.4-N of friction. (a) Determine the magnitude and direction of the net force acting on the sofa. Fnet = 47 N x to the right (b) Find the net work done on the sofa. Wnet = JX (c) Suppose the 84-kg sofa was moving left at 2.18 m/s when you started pushing it? . What was the sofa's initial kinetic energy? Ki = 181.44 J X . What was the sofa's final kinetic energy? K/ = 199.6008 J X . How fast was the sofa moving at that point? Vi = 0 m/s x Submit