A bus decreases its speed from 80 km h-1 to 60 km h-1 in 5 s. Find the acceleration of the bus.
(We know, )
Given, Initial speed of the bus, =
The final speed of the bus, =
Time is taken,
The negative sign implies retardation.
Therefore, the acceleration of the bus is
Or, the retardation(de-acceleration) of the bus is