质点P在一直线上运动,其坐标x与时间t有如下关系:x=Asinwt(SI)(A为常数):求任意时刻t时质点的加速度
人气:322 ℃ 时间:2019-10-17 02:36:47
解答
距离关于时间一次导是速度,二次导就是加速度v=x‘=Awcos(wt)a=x“=-Aw^2sin(wt)……该式即任意时刻t质点的加速度当t=0时,用第一个式子即可得到时间t
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