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 t1/lre be :91i1npug lme3 apv-(xj3n 4dn4mewd nsions in the ropes are 50 N, what is the mass of the traffic lighnm34dd an-3 v wj(4pxet?

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


参考答案:  C


本题详细解析: 暂无

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