Newton’s law of motion (id: c2890d7e6)

本题目来源于试卷: Newton’s law of motion，类别为 美国物理杯赛(Physics Bowl)

[单选题]
98.03: An object in equilibrium has three forces, F1 si+vsg: k978m wwn-ykeu7:r3bf:sxh of 30 aa,4pv6+ohwx N, F2 of 50 N, and F3 of 70 N, acting on it. The magp 64a vwax+o,hnitude of the resultant ofF1 and F2 is

A. 10 N
B. 20 N
C. 40 N
D. 70 N
E. 80 N


参考答案:  D


本题详细解析: 暂无

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