Physics Unit4: Force Dynamics & Newton's Laws (id: 88b54564b)

本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws，类别为 通用国际物理

[单选题]
In Fig. 4-2, if the tensions in the/0fa v3.rqsl q(edta2 ropes are 50 N, what is the mass pp xeh ;sifv4n ,7ms; -k;yueud+aw6-of the traffic light?eusewas6m+p,yh;- uk7pv xi ;fdn-4;

A. $3.1 \; kg$
B. $4.1 \; kg$
C. $6.1 \; kg$
D. $8.1 \; kg$


参考答案:  C


本题详细解析: 暂无

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