本题目来源于试卷: Overweight and underweight，类别为 美国物理杯赛(Physics Bowl)
[单选题]
94.25: One end of a massless 5vc14n48j rj/j a qmqgrope is attached to a mass m; t +bbl)j ;x*y,f-b znd lhe other end is attached to a mass of 1.00 kg. The rope is hung over a massless frictionless pulley as shown in the accompanying figure. dlyx * bz);lbfn+,jb- Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?
A. 3.0 kg
B. 2.0 kg
C. 1.5 kg
D. 1.0 kg
E. 0.5 kg
参考答案: A
本题详细解析:
暂无
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