A runaway railroad car, with mass 45.0 × 10^4 kg, coasts across a level track at 3.80 m/s when it collides with a spring-loaded bumper at the end of the track. If the spring constant of the bumper is 3.80 × 10^6 N/m, what is the maximum compression of the spring during the collision? (Assume the collision is elastic.)
a. 1.31 m
b. 1.85 m
c. 0.925 m
d. 2.10 m
e. 2.62 m
a
Physics & Space Science
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