A banked circular highway curve is designed for traffic moving at \( 65 \mathrm{~km} / \mathrm{h...

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A banked circular highway curve is designed for traffic moving at \( 65 \mathrm{~km} / \mathrm{h} \). The radius of the curve is \( 200 \mathrm{~m} \). Traffic is moving along the highway at \( 40 \mathrm{~km} / \mathrm{h} \) on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn without sliding off the road? (Assume the cars do not have negative lift.)
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