Circular Motion (id: 662ab03ff)

本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)

[单选题]
14.23:Two small identical coinszj:kv q1vps+t bi 1q:6 (labev7z l ay9qfk42led X andY) are at reston a horizontal disk rotating at a constant rate about an axis perpendicular to the plaf4lv 7qy2z9 akne of the disk and through its center. The distance of the coins from the center of disk is related by $d_x=\frac{1}{2}d_x$. Which one of the following choices correctly identifies the relationship between $f_x$and $f_y$ , the frictional force on coin X and on coin Y, respectively?

A. $f_x=\frac{1}{4}f_y$
B. $f_x=\frac{1}{2}f_y$
C. $f_x=f_y$
D. $f_x=2f_y$
E. $f_x=4f_y$


参考答案:  B


本题详细解析: 暂无

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