Question

A railroad car of mass 3.35 ✕ 104 kg moving at 3.15 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. What is the speed of the three coupled cars after the collision?

Name: a railroad car of mass 335 104 kg moving at 315 ms collides and couples with two coupled railroad cars each of the same mass as the single car and moving in the same direction at 120 ms what is the sp
Uploaded: 2023-06-30T15:57:21-08:00
Duration: 1 min 22 s
Channel: Ivan Kochetkov
Description: a railroad car of mass 335 104 kg moving at 315 ms collides and couples with two coupled railroad cars each of the same mass as the single car and moving in the same direction at 120 ms what is the sp

          A railroad car of mass 3.35 ✕ 104 kg moving at 3.15 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. What is the speed of the three coupled cars after the collision?

Added by Ana B.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Ivan Kochetkov

06/30/2023

Step 1

The total momentum before the collision is equal to the total momentum after the collision. The momentum of the single car before the collision is its mass times its velocity, which is 3.35 x 10^4 kg * 3.15 m/s = 1.05525 x 10^5 kg*m/s. The momentum of the two Show more…

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A railroad car of mass 3.35 ✕ 104 kg moving at 3.15 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. What is the speed of the three coupled cars after the collision?