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众所周知,位移对时间的一阶导数是速度,二阶导数是加速度。那么它的三阶导数是什么? 1928年P.Melchior把“加速度对时间的导数”定义为“急动度”[jerk]。由于工程材料的
It is well known that the first derivative of displacement to time is velocity and the second derivative is acceleration. Then what is its third derivative? In 1928 P.Melchior defined the “derivative of acceleration versus time” as “jerk.” Due to the engineering material