本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.41: A centripetal fox9/+klm*f4tm hsj r*t rce of 5.0 newtons /let4lmbmp* y *m4es(yw pg60is applied to a rubber stopper moving at a constant speed in a horizontal circle. If the same force is applied, but the radius is made smaller, what happens to the speed v, andtmp6lmwg*y/sm e* bp40 l4(ye the frequency f, of the stopper?
A. $v$ increases & $f$ increases
B. $v$ decreases & $f$ decreases
C. $v$ increases & $f$ decreases
D. $v$ decreases & $f$ increases
E. neither changes
参考答案: D
本题详细解析:
暂无
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