如图为某质点的振动图像，下列判断正确的是_刷题宝

题干

如图为某质点的振动图像，下列判断正确的是（）

A：质点的振幅为10cm

B：质点的周期为4s

C：t=4s时质点P的速度为0

D：t=7s时质点Q的加速度为0

上一题下一题 0.0难度选择题更新时间:2018-11-18 06:21:53

答案(点此获取答案解析）

B

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