00:01
In this problem, we have a car, which is initially moving at 25 meters per second, and it comes to a stop.
00:09
And this stop occurs over a distance of 85 meters, and we would like to find the acceleration that is happening, assuming it is constant.
00:20
And so we're going to use one of our constant acceleration equations, and that equation would be final speed squared is equal to initial speed squared.
00:29
And this could be velocity, but we weren't given direction, so we're treating them as speed.
00:34
It's equal to 2 times acceleration times distance.
00:38
Now we know our final velocity is going to be 0.
00:43
Our initial is 25, and that is squared, plus 2 times acceleration times are 85 meters.
00:55
Now, the first thing you're going to do to get your answer or your x by itself would be to square the 25...