A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 340 km/h in a semicircular arc with a radius of 196 m.(adsbygoogle = window.adsbygoogle || []).push({});

Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration.

7.2429m/s2

Determine the radial acceleration of the car at this time.

22.75m/s2

If the curve were flat, what would the coefficient of static friction have to be between the tires and the roadbed to provide this acceleration with no slipping or skidding?

I've solved the first two parts, but i'm stuck on the third.

I tried Force of Static Friction = Coefficient * Force of Normal and then setting that equal to the Centripetal Force ((m * V^2) / R), ending up with

Coefficient = V^2 / (R * g)

Don't know what else to do...

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# Circular Motion & Friction

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