Question an icy road is banked at a 15 degree angle a car, Ask an Expert

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Question: An icy road is banked at a 15 degree angle. a car must follow a curve in the road that has a quarter-circle shape. The distance along the curve is 90 meters.

Part A: What speed should the care have to best avoid sliding?

I want help to find what speed the care should have to best avoid sliding.

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