Two blocks A and B with masses m = 500 Kg and m = 75 Kg, respectively, are connected by an inextensible cord as shown. Assuming = 30, negligible friction between ground and A, and k = 0.1 and s 0. Assuming both A and B start at rest, and after releasing B moves up d = 30 cm relative to A. a) Compute the work done by the tensile forces. (5 points) B 1.1k b) Compute the work done by the frictional forces (5 points) frictionless c) Write the expressions for Kinetic and Potential energies of A and B at release and at instance when B moves up d = 30 cm relative to A (5 points). d) Apply work energy principles to compute velocities of A and B when B moves up d = 30 cm relative to A (5 points).