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} where vec a is acceleration, vec v – velocity, vec r – displacement mathit stands for time. Yank is the analog of force with respect to jerk: mass times jerk, or equivalently, the derivative of force with respect to time (this is only true non-relativistically; since mass is

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