2.某一质点做简谐运动的位移x与时间t的关系图如图2所示由图2可知在t=1s时质点的速度和加速度为 A.速度为零加速度为正的最大值 Template




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tomski2.某一质点做简谐运动的位移x与时间t的关系图如图2所示由图2可知在t=1s时质点的速度和加速度为 a.速度为零加速度为正的最大值 coloring