# Thread: Finding the stopping distance using d=0.20v+0.15v^2.

1. ## Finding the stopping distance using d=0.20v+0.15v^2.

The stopping distance, d in meters for a car traveling at v km/h is given by the formula d=0.20v+0.15v^2. Find the increase in stopping distance when v is increase by x km/h.

I do not get this at all much help appreciated

2. ## Re: Need help math question

Replace v with v+x.

what do you get?

3. ## Re: Need help math question

Originally Posted by BobNeedsMuchHelp
The stopping distance, d in meters for a car traveling at v km/h is given by the formula d=0.20v+0.15v^2. Find the increase in stopping distance when v is increase by x km/h.
$d_{new}=0.20(v+x)+0.15(v+x)^2$

increase = (d new) - (d old)