Question

find the initial velocity of a car
which is a stopped in 10 seconds
applying brakes. The retardation due to brakes is 2.5 m per second square

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Answer 1

Given, acceleration (a) = -2.5 ms^-2

time (t) = 10 s

initial velocity (u) = ?

Final velocity (v) = 0

We know, v = u + at

or, 0 = u + (-25)

or, u = 25 m/s

HOPE THIS COULD HELP!!!