Posted by **mark** on Saturday, September 29, 2012 at 1:30pm.

Let the radius of the circular segment be 92 m,

the mass of the car 2393 kg, and the coefficient

of the static friction between the road and the

tire 0.9.

Find the magnitude of the normal force N which the road exerts on the car at the opti-

mal speed (the speed at which the frictional

force is zero) of 82 km/h. The acceleration

due to gravity is 9.8 m/s2

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