Solved: An 11,000-kg freight car rests against a spring bumper at the end of a railroad
Chapter 9, Problem 45(choose chapter or problem)
An 11,000-kg freight car rests against a spring bumper at the end of a railroad track. The spring has constant k = 0.32 MN/m. The car is hit by a second car of 9400-kg mass moving at 8.5 m/s, and the two couple together. Find (a) the maximum compression of the spring and (b) the speed of the two cars when they rebound together from the spring.
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