Question

a car is retarded by applying brake at the rate of 2 m/s it is finally stopped in 10 seconds find its initial velocity

Answer 1

Given :

a =2ms-2 ,t =10s,v = 0

Using ,v=u + at

we get , 0 = u + (-2) x 10

u = 20 ms-1

Initial velocity = 20 ms-1