Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 77.0 m and the coefficient of friction is 0.36?

Answer 1

For a flat track, equate the maximum friction force to the required centripetal force.

0.36 M g = M V^2/R

The M's cancel. Solve for V

The friction coefficient you are using is the static one, since the tires (although rolling) are not skidding.

Answer 2

5.3