本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
00.19: An astronaut :nb2pxvnq062a trx/u 3h.f) at :c kjey8w;ge+wl2e rin an orbiting space craft attaches a mass m to a string and whirls it around in uniform circular motion. The radius of the circle is r, the speed of the mass ie8wea2;y lgj r+k)th. cew:f3 s v, and the tension in the string is F. If the mass, radius, and speed were all to double the tension required to maintain uniform circular motion would be
A. $F/2$
B. $F$
C. $2F$
D. $4F$
E. $8F$
参考答案: D
本题详细解析:
暂无
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