Two identical buggies 1 and 2 with one man in each move without friction due to inertia along the parallel rails toward each other. When the buggies get opposite each other, the men exchange their places by jumping in the direction perpendicular to the motion direction. As a consequence, buggy 1 stops and buggy 2 keeps moving in the same direction, with its velocity becoming equal to v. Find the initial velocities of the buggies `v_1` and `v_2` if the mass of each buggy (without a man) equals M and the mass of each man m.

Two identical buggies 1 and 2 with one man in each move along parallel rails. When the buggies are opposite to each other, the men jump in a direction perpendicular to the direction of motion of buggies, so as to exchange their places. As a consequence, buggy 1 stops and buggy 2 keeps moving in the same direction with its final velocity v . Find the initial velocities v_(1) and v_(2) of buggies. Mass of each buggy (without man) equals M mass of each man is ignore frictional effects anywhere and the buggies are constrained to move along the rails only.

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Why two boats moving in parallel directions close to each other get attracted?

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In how much time trains will pass each other if they are moving in the same direction.