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If a car takes a banked curve at less than the ideal speed, friction is needed...

If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads).

(a) Calculate the ideal speed to take a 125-m radius curve banked at 14.0°.

Did you draw a free body diagram and label all forces acting on a vehicle? km/h

(b) What is the minimum coefficient of friction needed for a frightened driver to take the same curve at 25.0 km/h?

Identify the force that supplies the centripetal force needed to keep a vehicle in this circular path.

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