Railway Collision Tests, G-Force on Railway Accidents

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When change in velocity occurs Acceleration. When change in acceleration, occurs Jerk. V=x/t (v:velocity, x: position, t: time) fourth derivative position vector with respect to time is Snap, sixth derivation with respect to time is Pounce. Negative g resistance of ordinary human body (uneducated to resist to g force) is about −3 g (−29 m/s2). In this happen may occur temporary vision loss, or vision fade to red it refers to as red out. Both of g exposure time and g level are significant parameters for human body health.