What is the Centripetal Acceleration of a Race Car on a Circular Track?

AI Thread Summary
To find the centripetal acceleration of a race car on a circular track, the radius must be calculated as half of the track's diameter. Given a diameter of 1.00 km, the radius is 0.50 km or 500 meters. The formula for centripetal acceleration is Ac = v^2/r, where v is the speed in meters per second. Converting the car's speed from 90.0 km/h to m/s gives approximately 25 m/s. Using these values in the formula results in a centripetal acceleration of 1.56 m/s^2.
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Homework Statement



I am having difficulty with a problem: A race care goes around a level, circular track with a diameter of 1.00 km at a constant speed of 90.0 km/h. Wha tis the car<s centripetal acceleration in m/s^2?

Homework Equations



Ac=v^2/r

The Attempt at a Solution



I'm not quite sure if I'm supposed to find the radius of the 1.00 diameter or if I simply use the 1.00 km as my radius in the above equation...?
 
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..a=\frac{v^2}{r}

r=radius...so yes you must find the radius(which is half of the diameter!).
 
Radius is half the diameter.
 

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