00:01
A race car driver is driving at a constant speed.
00:03
That means it does not change.
00:04
You're going to use v for speed, and that is 50 .5 meters per second.
00:09
That constant speed is important when we're doing our second part of this problem.
00:13
And they are on a circular track, which has a radius of 245 meters.
00:19
The first thing we want to know is what is the angular speed in radiance per second.
00:23
And so the equation we're going to use is tangential or linear speed of an object rotating, is equal to our angular speed times radius.
00:32
Divide both sides by radius and get angular speed is tangential speed divided by radius.
00:38
And so that is 50 .5 divided by 245.
00:44
And from this we get 0 .20, that is not a 0, excuse me, 206 radiance per second...