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]
01.14: A football is kioc tkk(icoxad9m/vo1 p .f,: 6cyo ,5b.whv qrrr -tr7tp)jh89 ked a distance of 50 yards down field. Neglecting air resistance, which of the following staty-5t,. bwvr7 h8prqr9tr h o)jements would be INCORRECT when the football reaches its highest point.
A. all of the ball's original kinetic energy has been changed into potential energy
B. the ball's horizontal velocity is the same as when it left the kicker's foot
C. the ball will have been in the air one-half its total flight time
D. the ball has an acceleration of $g$
E. the vertical component of the velocity is equal to 0
参考答案: A
本题详细解析:
暂无
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