Physics Unit8: Rotational Motion (id: 67b759614)

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本题目来源于试卷: Physics Unit8: Rotational Motion，类别为 Generic Physics

[单选题]
An object's angular momenla* 6 hykb(h83x2v lcntum changegfycc ,o)v/:qqn nh;92k2 rgncpx.3es by $20 \; kgm^{2}/s$ in 4.0 s. What magnitude average torque acted on this object?

A. $2.5 \; N \cdot m$
B. $5.0 \; N \cdot m$
C. $40 \; N \cdot m$
D. $80 \; N \cdot m$


参考答案:  B


本题详细解析: 暂无