A person driving a car with a speed 72km/h, suddenly sees a boy crossing the road

Home Work Help
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1

A person driving a car with a speed 72km/h, suddenly sees a boy crossing the road. if the distance moved by car, before the person applies brakes is 5m, the reaction time of the person is______.

2

The following steps are to be followed to solve the query:

  1. Convert the speed in m/s.
  2. The reaction time is the time interval when the person sees the boy and presses the brakes. In this time interval, the person covers the distance say ‘s’.
  3. Use this distance and the speed in m/s to find the time as t = d/v. You should get the answer as 0.25 s.