# Rate of Deceleration & Time Required

dgsigala

## Homework Statement

A truck traveling at 40.0 m/s decelerates uniformly to 20.0 m/s over a distance of 100 m. Determine the rate of deceleration and the time required for the truck to travel the 100 m.

## Homework Equations

Deceleration=(original velocity-final velocity)/Time

## The Attempt at a Solution

s=ut + $\frac{1}{2}$at2
v2=$\!$$\:$u2+2as