Physics Bowl by Topic 3: Kinematics - part II Uniformly Accelerated Motion (id:

本题目来源于试卷: Physics Bowl by Topic 3: Kinematics - part II Uniformly Accelerated Motion，类别为 美国物理杯赛(Physics Bowl)

[单选题]
94.03: A ball is thron.f n 4bpi3:li 6;,msve xt-r4g1xykywn off a h z;dc8am) ihxwbb1; gz(4z jj.igh cliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity of the ballz;gjw j. z(ax;) hb1idmb4z8c ?

A. 100 m/s up
B. 20 m/s up
C. 0
D. 20 m/s down
E. 100 m/s down


参考答案:  B


本题详细解析: 暂无

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