A runaway railroad car, with mass 2.4 · 105 kg, coasts across a level track at...
A runaway railroad car, with mass 2.4 · 105 kg, coasts across a level track at 3.0 m/s when it collides with a spring-loaded bumper at the end of the track. If the spring constant of the bumper is 1.6 · 106 N/m, what is the maximum compression of the spring during the collision? (Assume the collision is elastic.)
Homework Answers
Since the collision is elastic,kinetic energy of railroad car is converted into potential energy of spring without any losses.
ANSWER: 
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A runaway railroad car, with mass 2.4 · 105 kg, coasts across a
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