Answer to Question #97800 in Mechanics | Relativity for Mathew

Question

A car slows down from 20m/s with a uniform velocity retardation of 25m/s2 calculate how long it will take the car to reach 5m/s and the distance that will be covered .

Answer 1

The time is

$$t=\frac{V-v}{a}=\frac{20-5}{25}=0.6\ s$$

$$V^2-v^2=2as$$

$$20^2-5^2=2(25)s$$

The distance that will be covered:

$$s=7.5\ m$$