本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
16.40: An object moves in a cir eqh hq k3tra( o,1m96icle, starting at th x(-,kwi1w*qk pqp 2dle top, with initial speed 17.0 m/s. The object’s speed increases uniformly until ,pk*x 1d2-k q (qiwlwpit has moved counterclockwise through an angle of$55^{\circ}$. The average acceleration for this motion is $9.8 m/s^{2}$directed straight downward.
What is the time for this motion?
A. 1.54s
B. 1.80s
C. 2.26s
D. 2.48s
E. 2.93s
参考答案: D
本题详细解析:
暂无
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