Question

A bus running at speed of 18 km per hour is stopped in 2. 5 seconds by applying brakes. Calculate the retardation produced.

Answer 1

Its simple,Initial Velocity= 18 km/hour. Final velocity= 0 (because the car stops.) Time= 2.5 seconds.

acceleration= (v-u/)t

                       = 0 - 5 / 2.5 

                       = -2 m/s2