Question

if a bus is travelling 20km/s is subjected to a study deceleration of 5m/s^2 how long it will take to come rest​

Answer 1

Explanation:

a=-5m/s^2

u=20m/s

v=0

a=v-u/t

-5m/s^2=0-20/t

t=20/5

t=4s