chrisimichaels5179 chrisimichaels5179 16-04-2024 Physics contestada A 4.00 ✕ 10⁵ kg subway train is brought to a stop from a speed of 0.500 m/s in 0.600 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)?