A mass-spring system is initially compressed towards a wall and hold in equilibrium with the help of a force F. At time t = 0 sec, the force F is suddenly released. The mass-spring system then reaches a velocity v while sliding on the frictionless surface. (a) What is the work done by the wall on the mass-spring system as the force F is released? (b) Is the energy of the mass-spring system conserved? Why? (c) Calculate thevin terms of k, mand F. (d) Is the linear momentum conserved? (e) Calculate the average force exerted by the wall on the mass-spring system after the force F is released, assuming that the spring remains in contact with the wall for a short time At. Express your answer in terms of k, m, At and F. before www. t = o m TIL after t = O www m