# Solution: What is the average impulsive force on the 60 ton rail car?

A 60 ton rail car moving at 1 mile/hr is coupled to a second stationary rail car. If the velocity of the two cars after coupling is 1 ft/s

#### Problem Statement: ME Board April 1997

A 60 ton rail car moving at 1 mile/hr is coupled to a second stationary rail car. If the velocity of the two cars after coupling is 1 ft/s (in the original direction of motion) and the coupling is completed in 0.5 second, what is the average impulsive force on the 60 ton rail car?

• A. 50 lbf
• B. 3500 lbf
• C. 1200 lbf
• D. 60 lbf

The average impulsive force on the 60 ton rail car is 3500 lbf.

Solution:

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