Question

A bus decreases its speed from 80 km/h to 60 km/h in 5 s and then from 60 km/h to 30 km/h in next 5 s. What do you think whether the acceleration of bus is uniform or non-uniform?

Answer 1

first of all its not acceleration its retardation since the speed decreases
and first it decreases 20km/h in 5s then 30km/h in 5 sec so its not uniform retardation