本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
15.40: A 2.0 kg mass is connected to the end 3cr610s asi-fpa acx795ag al of string hs);c 5l btmo kj97w9llwiwiy ;,nn50 and moves about the string’ j owhl59 w )9tlyis 0c,;i7;mnlb5nwks fixed end in a conical motion with a constant speed of 4.0 m/s. The string has a length of 2.50 m and forms an angle of $θ$ with the vertical. What is the tension in the string?
A. 20.0 N
B. 23.7 N
C. 27.4 N
D. 29.8 N
E. 32.5 N
参考答案: C
本题详细解析:
暂无
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