Springs and Collisions
Three blocks are resting on a frictionless surface. Two blocks, one of mass M1 = 5 kg and the
other of M2 = 2 kg, are held together, compressing a massless spring.
(The spring is not attached to the blocks--it has just been inserted between them.) When the constraints
are removed, block 1 moves to the left with a velocity of 2 m/s. Block 2 moves to the
right and collides with block 3, which has a mass of M3 = 5 kg. These blocks
stick together. What is the magnitude of the final velocity of the two blocks? v = m/s
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