本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 通用国际物理
[问答题]
An engineer is designing a springdf: n+d6rw9 px to be placed at the botfnvl6uy3 q x/ii8i9t 8tom of an elevator shaft. If the elevator cable should break when the elevator is at a height h above the top of the spring, calculate the value that the spring stiffness constant k should have so that passengers undergo an a q uil83/i968tvfyn xicceleration of no more than 5.0 g when brought to rest. Let M be the total mass of the elevator and passengers.
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