Question

a bus is running with velocity of 72km/h. if it is brought to rest suddenly brakes on seeing a man 20 meters a head on the road and the bus stops at a distance of 15 meter.calculate the time of bus

Answer 1

Answer:

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Explanation:

U=72km/h =20m/s

V=0

S=15m

a=v^2-u^2/2s

a=0-400/2×15

a=40/3

a=v-u/t

t=v-u/a

t=0-20×3/-40

t=3/2

t=1.5sec.