Railroad car?

Question:
1. A railroad car of mass 25000 kg is moving with a speed of 4 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 m/s. (a) What is the spee1. A railroad car of mass 25000 kg is moving with a speed of 4 m/s. It collides and
couples with three other coupled railroad cars, each of the same mass as the single
and moving in the same direction with an initial speed of 2 m/s. (a) What is the speed of four car after the collision? (b) How much energy is lost in the collision?

Answers:

Union pacific bought csx?

It is suggested that coupling be accomplished at or, preferably, below 4 mph to avoid damage to lading.

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Given that sheep get shorn, why do rail passengers put up with?

HOG is right 5.6mph will crack the in face of knuckle and damage the yoke

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