# Rate of Deceleration & Time Required

1. Sep 12, 2013

### dgsigala

1. The problem statement, all variables and given/known data

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.

2. Relevant equations

Deceleration=(original velocity-final velocity)/Time

3. The attempt at a solution

2. Sep 13, 2013

### Basic_Physics

Rather try and use
s=ut + $\frac{1}{2}$at2
or
v2=$\!$$\:$u2+2as