Rin F.
asked • 07/16/21What role does reaction time play in applying the brakes to your car in emergency situations? Assume your car is traveling at 100 kph when a pedestrian suddenly crosses the street in front of your car. How far will your car travel before you can apply the brakes?
Mike D. answered • 07/16/21
Effective, patient, empathic, math and science tutor
100 kph = 100 x 1000 / 3600 m/s = 27.8 m/s
Typical reaction time is about 0.25 s, so car will move 0.25 x 27.8 = 6.9 m before brakes are applied
Mike D.
you can just Google average human reaction time07/18/21
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Rin F.
Hi! Where can I find the reference material on why the reaction time is 0.25? Thank you so much again07/18/21