00:05
We have a vehicle that is traveling at 60 miles per hour.
00:10
That's, of course, 60 miles in one hour.
00:15
We also know that this vehicle has 32 -inch diameter wheels, or we could look at that as 16 -inch radius wheels.
00:27
Our goal is to turn this into revolutions per minute, so we're going to really focus on the units of our values.
00:36
We currently have hours, but we need minutes to make that conversion.
00:41
We know that one hour is equivalent to 60 minutes.
00:47
Now, i have chosen to write this fraction in a way that hours in the numerator, cancel hours in the denominator.
00:55
Now, as a result, if we stopped right here and multiplied our fraction straight across the top, straight across the bottom, we would have miles per minute.
01:04
Now that's closer to what we're going for, but we need revolutions per minute.
01:09
So let's work on these miles.
01:12
We know that there are 5 ,280 feet in one mile.
01:21
And again, i've chosen to write it this way so that the miles cancel the miles.
01:26
Now, i'm using feet here and breaking down my miles because i know that wheel measurement in inches is going to be important...