00:01
Upon reading this question initially, i noticed there's quite a bit of information that we don't need.
00:06
So i'm just going to write down what we do need.
00:08
It says the drive has a maximum speed of 10 ,000 revolutions per minute.
00:12
If a disk has a diameter of 14 centimeters, what is the linear speed? so we're looking for v in kilometers per hour of a 0 .6 centimeters from the center.
00:27
So that's going to be r equals 6 centimeters.
00:30
So even though they gave us the diameter of 14, we're going to use the 6.
00:35
And it's spinning at a rate of 4 ,000 revolutions per minute.
00:41
So even though they gave us the maximum speed, we're going to use this speed that they gave me.
00:46
So we know v equals r omega.
00:49
So that's going to be 6 centimeters times 4 ,000 revolutions per minute.
00:55
Now it's just a matter of dealing with our units...