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 throm8r6g/ -1xi 81g ++zcvrqge+ kepmjzywn straight up, reaches a maximum height, -,s1u x6 v.bem.oc;8jlku)dps k:n csthen falls to its initial height. Make a statement )onbm c-s k;s.v j1u.u8exc:6 pd,klsabout the direction of the velocity 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:
暂无
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