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 s3dkv1k7z my.mibsi:4,af eb 2pring to be placed at the bottom of ankgiwuap;e77 qxk ( wsf:z; /w- 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 stiffs7ku-;pq: awigf/;ew k7 ( xzwness constant k should have so that passengers undergo an acceleration 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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