Answer to Question #98314 in Physics for Nicky

Question

A bus moving at a speed of 25m/s was brought to rest in 20 seconds, the retardation is what?

Answer 1

The retardation is 

$$a=\frac{V-v}{t}$$

$$a=\frac{25-0}{20}=1.25\frac{m}{s^2}$$