Asked by Jimmy
Four railroad cars, each of mass 2.50 x 104 kg, are coupled together and coasting along horizontal tracks at some speed vi. Superman, riding on the second car, uncouples the very front car and gives it a big push, increasing its speed in the same direction to 4.00 m/s. The remaining three cars continue moving in the same direction, now at 2.00 m/s.
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Answered by
Anonymous
A railroad car of mass 2.50 x 104 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?
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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