G forces

Calculate deceleration of car (as multiple of gravitational acceleration g = 9.81 m/s2) which occurs when a car in a frontal collision slows down uniformly from a speed 111 km/h to 0 km/h in 1.2 meters trajectory.

Correct result:

G =  40.4 g


s=12at2=1.2 m 2s=at2  a=ΔvΔt  v=at=2st=111 km/h=30.833 m/s  t=2sv=21.230.833=0.0778378 s a=v/t=30.833/0.0778378=396.123 m/s2 G=a/g=40.4 g

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