A 12,500 kg railroad freight car travels on a level track at a speed of 5.2 m/s. It collides and couples with a 22,600 kg second car, initially at rest and with brakes released. What is the speed of the two cars after collision

Given :

A 12,500 kg railroad freight car travels on a level track at a speed of 5.2 m/s.

It collides and couples with a 22,600 kg second car, initially at rest and with brakes released.

To Find :

The speed of the two cars after collision.

Solution :

It is given that car couples with each other. So speed of both the cars after collision is same. Let, it be v.

Applying conservation of momentum, we get :

Therefore, the speed of the two cars after collision is 1.85 m/s.

tbh i dont know ether

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