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February 27, 2015

February 27, 2015

Posted by **Chan** on Sunday, November 15, 2009 at 4:08pm.

Question:The tires on a new compact car have a diameter of 2.0 ft and are warranted for 62,000 miles.

(a) Determine the angle (in radians) through which one of these tires will rotate during the warranty period.

physic - drwls, Sunday, November 15, 2009 at 1:46am

Each revolution moves the car pi*D = 6.283 feet

62000 miles is 327,360,000 feet

The number of revolutions is 5.210*10^7.

The number of radians is 2 pi times that... over 300 million

Hi! so you mean I have take 5.210*10^7 mutilply by 2 pi and than divide by 300 million. Just want to clarify thank you.

- physic -
**drwls**, Sunday, November 15, 2009 at 4:15pmWhen I wrote "over 300 million", I was giving you an estimate of the number of radians. You do NOT divide by 300 million.

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