Question

17. If the retardation caused by the brakes of a car
is 3 m/s, calculate the initial velocity at which
the car would be travelling to come to stop in
15 seconds​

Answer 1

v = u + at
where
V = final velocity i.e. 0
U = Initial velocity
A = Acceleration i.e. (-3 m/s2) ( As the vehicle is retarding )

T = time i.e. 15 seconds

v = u +at
0 = u + (-3) * 15
-u = -45
u = 45 m/s

Answer 2

Answer will be 45m/s

By the formula V=U+at

0 = u+(-3m/s^2)×15sec

-u=-45m/s

U=45m/s

HOPE IT HELP'S YOU!!!

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