Find the initial velocity of the car which is stopped in 10 sec by applying brakes .The retardation due to brakes is 2.5m/sec sq.....

v = 0

t = 10s

a = -2.5 m/s2

v = u + at

0 = u + (-2.5)(10)

0 = u - 25

u = 25 m/s

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