本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学
[问答题]
An engineer is designing a spring to be placed4co/jxxys g.vb**nznpy)p5x :v8 h6 d at the bottom of an ele/z- w m+qke(dkvator 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 accw/ ezq(dmk+k-eleration 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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