A 14,000-kg boxcar is coasting at 1.50 m/s along a horizontal track when it suddenly hits and couples with a stationary 10,000-kg boxcar. What is the speed of the cars just after the collision?

Explanation:

It is given that,

Mass of a box car,

Initial speed of a box car,

Initial speed of another stationary car is 0 as it was stationary

Mass of another box car is 10,000 kg

Let V is the speed of the cars just after the collision. It is based on the concept of inelastic collision. So, using the conservation of linear momentum we get :

So, the speed of the cars just after the collision is 0.875 m/s.

true tan speed = ang vel x radius

c. magnitude and direction