Arailroad car of mass 2.50*10^4 kg is moving with a speed of 4.00 m/s. it collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of 2.00 m/s. (a) what is the speed of the four cars after the collision? (b) how much mechanical energy is lost in the collision?
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Arailroad car of mass 2.50*10^4 kg is moving with a speed of 4.00 m/s. it collides and couples with...
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