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Physics Bowl by Topic 4: Kinematics - part III Projectile Motion (id: a81ec31c9)

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admin 发表于 2024-4-6 09:42:13 | 显示全部楼层 |阅读模式
本题目来源于试卷: Physics Bowl by Topic 4: Kinematics - part III Projectile Motion,类别为 美国物理杯赛(Physics Bowl)

[单选题]
15.21: An object is la s0: n j*rf hq ioh0.iml-hed1jv489zxunched fr-d g2de2 1oqhsom the ground at an angle of $60^{\circ}$ above the horizontal with a speed of 20.0 m/s. What is the magnitude of the average velocity of the object from just after launch until it reaches its highest vertical position during flight?

A. 13.7 m/s
B. 13.2 m/s
C. 10.0 m/s
D. 9.3 m/s
E. 8.7 m/s


参考答案:  B


本题详细解析: 暂无

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