本题目来源于试卷: Physics Unit2: Kinematics One Dimensional Motion，类别为 通用国际物理
[单选题]
Suppose a ball is thrl 3vt*djr 3jk3qd58qy1 o-rk2-gia f -pkv d htbb0i96own straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocitia-2tq bk 1b prgy-96 qk8if-h5d vdo0y and acceleration as the ball is going up.
A. Both its velocity and its acceleration point upward.
B. Its velocity points upward and its acceleration points downward.
C. Its velocity points downward and its acceleration points upward.
D. Both its velocity and its acceleration points downward.
参考答案: B
本题详细解析:
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