Question

If a car starts from rest and attains 20 ms-1 on 25 seconds. Find the acceleration.

Answer 1

a= v-u/t
=20-0/25
=20/25
=4/5m/s-2

Answer 2

u=0m/s v=20m/s t=25sec a=v-u/t =20-0/25m/s^2 =0.8m/s^2