物体做简谐运动,其图象如图11-2-6所示,在t1和t2两时刻,物体的

物体做简谐运动,其图象如图11-2-6所示,在t1和t2两时刻,物体的(    )

图11-2-6

A.相位相同         B.位移相同          C.速度相同            D.加速度相同

答案

C


解析:

由简谐运动的相位φ=ωt+φ0知时间不同,相位不同,故A错.t1和t2两个时刻位移大小相等、方向相反,故B错.在x-t图象中t1和t2两时刻斜率相同,故速度相同,C项正确.两时刻加速度大小相等、方向相反,故D错.

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