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A BMW is going around a banked curve in the road. It is part of a...

A BMW is going around a banked curve in the road. It is part of a circle with radius 125 m . An automobile that goes around the curve with speed 20 m/s does not require any friction force to not slip, but this BMW is going around the curve at 38.8 m/s. What's the smallest value the coefficient of friction (between the tires of the BMW and the road) that can be without any slipping?

Answer= .64 **But, How?**

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