Question

a car moving along A straight highway with a speed of 22 km per hour is speed of 72 km per hour is brought to stop with in the distance of 100m what is the retardation of car and has a long does it take to can stop

Answer 1

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u = 72 km/h

v=0

s =100m

v^2-u^2= 2as

-u^2= 2×a×100(v=0)

- 20^2=200a

-400=200a

a=-2 m/s^2

I hope, this will help you

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