Answer to Question #10082 in Mechanics | Relativity for Simona
An automobile tire is rated to last 35,000 miles. Estimate the number of revolutions the tire will make in its lifetime?
Let the tire radius be r feets. Then the length of tire circumference is L = 2πr. So, the tire makes
N =& 35000*5280/(2πr) = 924*10^5/(πr)
revolutions before wearing out.