Question

find the initial velocity of a car which is stopped in 20sec by applying brakes. the retardation due to brakes is 1.5m/s².

Answer 1

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Solut¡On:

v=0
u=?
t=20sec
a=1.5ms^-2

Formulae:

v=u+at

u+at=0

u+1.5×20=0

u+30=0

initial velocity=30m/s

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