Physics Unit8: Rotational Motion (id: 93c3755d0)

本题目来源于试卷: Physics Unit8: Rotational Motion，类别为 通用国际物理

[单选题]
An object's angular motj2/pqb ;c)xir5a8mqmentum changh-wg 40fh5dedes 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

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