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 kic -a12xb5u ykeoteh 9oa-k:ptp4z kg-4ked a distance of bz 1 t4.x;8 ddykmumkjkhad40e/) z j-50 yards down field. Neglecting air resistance, which of the following statements would be INCORRECT w/4 azu8k.k md kx0d1)bj ejzd-thy m;4hen 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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