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Physics Work,Power & Energy Level: High School

A 680.000 kg vehicle is negotiating a uniform turn of radius R = 50000 m at uniform speed v = 56.500 km/h . If the coefficient of static friction was not enough . Suppose it turns out to be 0.27 on some day when the road is wet or covered with ice . What angle would one hope the curve was banked at in order to make the turn safely without slipping ?( 11.68 degree)