masc twink 19 Posted June 19, 2014 Share Posted June 19, 2014 A car is traveling at 49 mph. If its tires have a diameter of 24 inches, how fast are the car's tires turning? Express the answer in revolutions per minute. If necessary, round to two decimal places. a. 4312 rpm c. 686.27 rpm b. 1372.55 rpm d. 666.27 rpm can u guys show ur work??? this is similar to a problem on my homework but im not getting the right answer on my calculator..... im pretty sure i did the work right -_- Link to comment Share on other sites More sharing options...
Allegra 491 Posted June 19, 2014 Share Posted June 19, 2014 A car is traveling at 49 mph. If its tires have a diameter of 24 inches, how fast are the car's tires turning? Express the answer in revolutions per minute. If necessary, round to two decimal places. a. 4312 rpm c. 686.27 rpm b. 1372.55 rpm d. 666.27 rpm can u guys show ur work??? this is similar to a problem on my homework but im not getting the right answer on my calculator..... im pretty sure i did the work right -_- Is this circular motion? Did you convert 49mph into however many inches per minute and then use v=r (radius - check that you divided diameter by two) x omega? (obviously rearranging to give w and etc) Link to comment Share on other sites More sharing options...
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