This article is about the physics concept of jerk. For other terms of jerk, see Jerk .In physics, jerk, jolt (esp in British English), surge or lurch, is the rate of change of acceleration; more precisely, the derivative of acceleration with respect to time, the second derivative of velocity, or the third derivative of displacement. Jerk is described by the following equation:vec j=frac vec a} t}=frac ^2 vec v} t^2}=frac ^3 vec r} t^3}wherevec a is acceleration,vec v – velocity,vec r &nda