帮忙翻译一道物理题.急.What should be the spring constant of a spring d
帮忙翻译一道物理题.急. What should be the spring constant of a spring designed to bring a 1220 kg car to rest from a speed of 90 km h-1 so the occupants undergo a maximum deceleration of 4.4g? 用Google之类自动翻译的不用来了.谢谢.