Question

A bus decrease its speed from 72km /h to54km /h in 10second. Calculate the acceleration of the bus​

Answer 1

It's acceleration is 0.5 m/s^2

initial speed, u= 72 km/h = 72×5/18 = 20m/s

final speed, v = 54km/h = 54×5/18= 15m/s

v = u+at

15= 20 + a×10

a = 0.5 m/s^2