Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is attached to the more massive block, and the blocks are pushed together with the spring between them as shown in the figure below. A cord initially holding the blocks together is burned; after that happens, the block of mass 3m moves to the right with a speed of V3m = 2.25 m/s. Before WWWWWW 3in After b (a) What is the velocity of the block of mass m? (Assume right is positive and left is negative.) m/5 (b) Find the system's original elastic potential energy, taking m = 0.310 kg. (c) Is the original energy in the spring or in the cord? in the spring O In the cord (d) Is the momentum of the system conserved in the bursting-apart process? Yes No (e) If the spring was compressed by 1:60 cm, what is the spring constant of the spring? N/m