Question

A bus of mass 5000 Kg is moving with velocity of 72km/hr. As a driver saw the child 200m ahead a
bus, he brought the bus in to rest by applying the brakes within 10 seconds. Calculate the distance
travelled by bus, retardation, and constant retarding force acted upon the tyres of bus. Analyze the
answer whether bus hits the child or not?

Answer 1

Answer:

V=0

U=72km\hr, 72×5/18 = 20 m/s

S=50m

Apply equation

V^2=U^2+2as

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0 = 20^2 +2×50×a

mark me as brilliantisy

0 = 400 + 100×a

-400 = 100a

a = -400/100

a = -4m/s^2