Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 8 - Think and Explain: 84

Answer

See the diagram. On a banked road, even in the absence of friction, the normal force N from the road has a horizontal component (shown as a dotted line) that can provides the necessary centripetal force if the car has just the right speed. The vertical component of the normal force (also shown as a dotted line) balances the weight of the car.
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