A bus moving with a velocity of 72 km/hr. On seeing the red signal of traffic at 27m ahead on the road, the driver applied brakes and the bus stopped at a distance of 25m. Calculate the time taken by the car to come at rest.
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Answer:
v=72km/hr=
18
72×5
=20m/s
Time taken to cover the distance of 5m is:
t=
20
5
=0.25sec
This time is called Reaction time.
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