Question

A car moving with a velocity of 20m/s is brought to rest by applying brakes in 5s. Calculate [4] i. Retardation ii. Distance travelled by the car

Answer 1

Answer:

The retardation = 4 m/s^2

Explanation:

Given,

u = 20m/s       v = 0m/s          t = 5s

Using , v = u + at

=> 0 = 20 + a*5

=> a = -20/5 = - 4 m/s2

So, retardation of train = 4m/s2