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A block of mass m1 = 150 kg is at rest o...

A block of mass `m_1` = 150 kg is at rest on a very long frictionless table, one end of which is terminated in a wall. Another block of mass `m_2` is placed between the first block and the wall, and set in motion towards `m_1` with constant speed `u_2`. Assuming that all collisions are completely clas tia find the value of `m_2` (in kg) for which both blocks move with the same velocity after `m_2` has collided once with `m_1` and once with the wall. (The wall has effectively infinite mass.)

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