block 1 of mass m1 = 6.6 kg is at rest on a long frictionless table that is up against a wall. Block 2 of mass m2 is placed between block 1 and the wall and sent sliding to the left, toward block 1, with constant speed v2i. Find the value of m2 for which both blocks move with the same velocity after block 2 has collided once with block 1 and once with the wall. Assume all collisions are elastic (the collision with the wall does not change the speed of block 2).

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