Question

Why are circular roads are banked? Deduce an expression for the maximum speed achieved while taking turn on a banked road.

Answer 1

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A mass moving in a circular path on a flat surface requires friction. If that surface is banked, the mass can move in a circular path without friction, but only if the conditions are optimal. In this lesson, we will derive the equations used in banked circular motion.

On-Ramp

When entering a curved section of any road, you might notice the road isn't flat, but banked. A banked surface is one that slopes upward towards the outer edge of a curve. Banked surfaces exist at on-ramps to highways because cars have to start traveling faster to enter the highway. The angle of banked surfaces of race car tracks range from 12° to 36°.

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