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 launcheq b 23rwbs1qm9 svhsu s-3/afi5. *jpkd at an angle an wwu+ x+q9/owod undergoes projectile motion. Air resistance is negligible. Which of the followinguw /w+wqoo9x+ is correct for the direction of its velocity vector and its acceleration 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 horizontalm u87, qovuh9l(mw jc1 velocity will be constant, therefore velocity will be horizontal.
Acceleration due to gr juv1ho q7ml um,c89w(avity is always downward
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