A 5.00*105 kg subway train is brought to a stop from a spee…
A 5.00*105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. What is the force constant k of the spring?
A 5.00*105 kg subway train is brought to a stop from a spee…