Space Time & Motion A.2 Forces & Momentum (id: 335f13cce)

本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学

[单选题]
A box with a mass of9w b 91yorzlh3 ffdgfw b0) a:-M rests on a balance in an elevator that is moving downwards. The elevator slows with an acceleration b0f -:wg ffda)of $\frac{g}{4}$.



Which of the following gives the reading of the balance?

A. $\frac{5Mg}{4}$
B. $Mg$
C. $\frac{3Mg}{4}$
D. $\frac{Mg}{2}$


参考答案:  A


本题详细解析:

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