问题
不定项选择
物体做匀加速直线运动，经过A点的速度是vA，经过B点的速度是vB，C为AB的中点，则经C点的速度的大小是 [ ]
A．
B．
C．
D．
答案
答案：D
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物体做匀加速直线运动，经过A点的速度是vA，经过B点的速度是vB，C为AB的中点，则经C点的速度的大小是 [ ]
A．
B．
C．
D．
答案：D
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