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June 12th, 2011, 03:14 PM   #1
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angular acceleration

If a car accelerates from 32.7 km/h to 54.7 km/h in 14.5 s, and the tires have an angular acceleration of 1.639 rad/s2, what is the radius of the tires?

Anyone know how to best solve this?
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June 13th, 2011, 01:02 AM   #2
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Re: angular acceleration

Quote:
Originally Posted by MasterOfDisaster
If a car accelerates from 32.7 km/h to 54.7 km/h in 14.5 s, and the tires have an angular acceleration of 1.639 rad/s2, what is the radius of the tires?

Anyone know how to best solve this?
The speed along the road is distance/time
The distance is 2*Pi*R for each revolution of the wheel radius R
One revolution is 2*PI radians of angle
Acceleration is rate-of-change of speed
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June 13th, 2011, 05:54 PM   #3
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Re: angular acceleration

Thank you
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