A car approaches a level, circular curve with a radius of \(45.0 \mathrm{~m}\). If the concrete pavement is dry, what is the maximum speed at which the car can negotiate the curve at a constant speed?

THINKING IT THROUGH. The car is in uniform circular motion on the curve, so there must be a centripetal force. This force is supplied by static friction, so the maximum static frictional force provides the centripetal force when the car is at its maximum tangential speed.