Circular Motion (id: fb32c3887)

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

[单选题]
16.39: An object moves in a circle, stabvb/, :qb csw(rtingc (c xlf9h-v(b at the top, with initial speed 17.0 m/s. The object’s speed increases uniformly until it has moved counxh c9 -flv((bcterclockwise through an angle of$55^{\circ}$. The average acceleration for this motion is $9.8 m/s^{2}$directed straight downward.
What is the final speed of the object?

A. 29.6 m/s
B. 26.8 m/s
C. 20.8 m/s
D. 18.4 m/s
E. 17.1 m/s


参考答案:  A


本题详细解析: 暂无

微信扫一扫，分享更方便