Circular Motion (id: 6a0618307)

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 conn5c u..dkp+aae fhn5ki3 lcf* .ct;y; oected tobourmo5u //v+6uuh+-q0 an x h the end of string and moves about the strinvruhq-xo/ u +5n6 +obuamh0/u g’s 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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