A car drives about an unbanked curve at a constant speed of around 60mph. Hanging from the rear view mirror of the car is an object on the string. As the car goes around the curve, the object suspends at an angle of 25° with respect to the vertical.
i) Determine the radius of curvature of the road?
ii) When the car is moving at the maximum speed possible devoid of slipping, determine the coefficient of static friction among the car’s tires and the road.