Question Description

A car moving with a velocity of 18 kmph is brought to rest in a distance of 0.5 km by applying brakes. Find its retardation?
Solution:

 
Initial Velocity of the car = u = 18 kmph= 5 ms-1,
Final Velocity of the car = v = 0,
Distance travelled = S = 0.5 km = 500m
We have, v2 = u2 + 2as.
             0 = 52 + 2 × a × 500
               = 25 + 1000a.A car moving with a velocity of 18 kmph is brought to rest in a distance of 0.5 km by applying brakes. Find its retardation? Solution:  Initial Velocity of the car = u = 18 kmph = 5 ms-1,Final Velocity of the car = v = 0,Distance travelled = S = 0.5 km = 500m We have, v2 = u2 + 2as.              0 = 52 + 2 × a × 500                = 25 + 1000a.