posted by Kristen .
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 80.0 m and the coefficient of friction is 0.38?
At the maximum safe speed V, the maximum possible static friction force equals the centripetal force.
M V^2/R = M g*0.38
Cancel the M and solve for V
V = sqrt(0.38 g R)