gc physics textbook chapter 6 problems (id: ac7c96ddf)

本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学

[填空题]
An elevator cable breaks when a 920-kg eso +;mthukti-al4;k 3leva2mgg(0 ce:ajksfny/ x*p6 -bator is 28 m above a huge spring ($k=2.2\times10^{5} \mathrm{N/m}$) at the bottom of the shaft. Calculate
(a) the work done by gravity on the elevator before it hits the spring,$\approx$    j
(b) the speed of the elevator just before striking the spring,$\approx$    m/s
(c) the amount the spring compresses (note that work is done by both the spring and gravity in this part).    m

参考答案:
空格1: 250000±2%  空格2: 23±2%  空格3: 1.56±2% 


本题详细解析:

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