试题与答案

关于曲线运动,下列说法正确的是[ ] A.曲线运动一定是变速运动 B.曲线运动是

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题目:

关于曲线运动,下列说法正确的是[ ]

A.曲线运动一定是变速运动

B.曲线运动是变速运动,但一定不是匀变速运动

C.做曲线运动的物体的加速度可能为0

D.做曲线运动的物体,其速度的大小一定在不断地发生变化

答案:

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