本题目来源于试卷: Space Time & Motion A.1 Kinematics，类别为 IB物理学
[单选题]
A basketball is launched at an angl75pn jxb + ek.czy 1-*hcjfwj1e and undergoyta 2 ,js6-nm1wtkc+ uej3a7ves projectile motion. Air resistance is negligible. Which of the following is correct for the direction of its velocity vector and its acceleratiotkmc, n7tv1ea6- swj+a23 jyun vector at the highest point of its trajectory?
what's the direction of velocity vector direction of acceleration vector respectively?
A. horizontal, no acceleration
B. no velocity, no acceleration
C. no velocity, downward
D. horizontal, downward
参考答案: D
本题详细解析:
At the top of its trajectory, vertical velocity will be zero, but the horipvu)nsv 7 (*lhzontal velocity will be constant, therefore velocity will be horizontal.
A) hvvn uspl7(*cceleration due to gravity is always downward
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