Q- Two blocks of masses M and 3M 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. When the blocks released, the block of mass 3M moves to the right with a speed of 2.00m/s
(a) What is the velocity of the block of mass M?
(b) Find the system's original elastic potential energy, taking M=0.350 kg.
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