Question

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

Answer 1

25m/s
...............

Answer 2

Given

Retardation =-accelartion=2.5m/s

v=0

u=?

t=10s

By relation

a=v-u/t

-2.5=0-u/10

-u=-25

u=25m