(5) Two blocks of masses M and 5M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them, as seen in the figure below. A cord initially holding the blocks together is burned; after this the block of mass 5M moves to the right (the positive direction) with a speed of v1=1.64 m/s. M Before (a) V1 M after (b) (a) What is the velocity of the block of mass M? Submit Answer | Tries 0/10 (b) Calculate the original elastic energy in the spring if M = 0.385 kg. Submit Answer Tries 0/10