A car is traveling at 40 mph and has tires that are 94 meters in diameter. Find the angular speed of the wheel in revolution per minute.

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- Aug 29th 2008, 02:10 AMjcroduaFind the angular speed
A car is traveling at 40 mph and has tires that are 94 meters in diameter. Find the angular speed of the wheel in revolution per minute.

- Aug 29th 2008, 07:38 AMSoroban
Hello, jcrodua!

I'm sure there's typo . . . please check the wording.

Quote:

A car is traveling at 40 mph and has tires that are*94 meters*in diameter.

Find the angular speed of the wheel in revolution per minute.

. . Now*that*is a monster truck!

It's probably: .

- Aug 29th 2008, 08:41 AMjcrodua
- Aug 29th 2008, 12:41 PMSoroban
Hello, jcrodua!

You're expected to know how to change units.

Quote:

A car is traveling at 40 mph and has tires that are 94 cm in diameter.

Find the angular speed of the wheel in revolution per minute.

We know that: .

.[1]

The tire is moving down the road at 1072.896 meters per minute.

The circumference of the tire is: .

. . That is: .

Convert [1]: .