alalalgfysjk9155 alalalgfysjk9155 26-05-2023 Physics contestada In a railroad yard, a 4.0×104 kg boxcar moving at 7.5 m/s is stopped by a spring-loaded bumper mounted at the end of the level track. If k = 1.6 MN/m , how far does the spring compress in stopping the boxcar?
