Question

A driver applies the brakes and slows down the velocity of the bus from 80 km/h to 60 km/h in 5 seconds .calculate the accerlaratiin of the bus
Ans.(-1-11 m/s^2)

Answer 1

initial velocity, u= 80 km/h= 200/9 m/s

final velocity, v= 60 km/h = 50/3 m/s

time, t= 5 s

v=u+at

⇒200/9=(50/3)+5a

⇒(200/9)-(50/3)=5a

⇒5a= (200-150)/9

⇒5a= 50/9

⇒a= 10/9

⇒a= 1.11 m/s²