gc textbook chapter 11 Vibrations and Waves (id: b4dba64a5)

本题目来源于试卷: gc textbook chapter 11 Vibrations and Waves，类别为 通用国际物理

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An elastic cord is 65 cm long when a weightj y138n rhaoc2o ,c.cx of 7 r4hr5hywue1f gsa9d8o3,t8i 5 N hangs from it but is 85 cm long when a weight u ,5re81 g89wsy3 ordih4hfat of 180 N hangs from it. What is the “spring” constant k of this elastic cord?    N/m

参考答案: 530±2%


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