Physics Bowl by Topic 4: Kinematics - part III Projectile Motion (id: 94f4931f6)

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]
14.40: A small 1.35-gram mass is launched from the top of a cliff at an1uoipv24vyz : angl1d. (6zf1ft,cu (ieqncoln d6 e ofdnl16ic(df,z1eo t cn6f uq .( $15.9^{\circ}$ above the horizontal. When the mass reaches the ground 4.33 seconds later, its velocity is directed at $34.4^{\circ}$ below the horizontal. What is the speed of the mass when it reaches the ground? (ignore air resistance)

A. 60.7 m/s
B. 54.1 m/s
C. 46.4 m/s
D. 43.3 m/s
E. 38.8 m/s


参考答案:  B


本题详细解析: 暂无

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