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Q. A banked circular highway curve is designed for traffic moving at 59 km/h. The radius of the curve is 221 m. Traffic is moving along the highway at 51 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?

Q. A trough 3m long has a semicircular cross-section of radius 4m. If the trough is full of oil with density 800kg/m^3, find the work done in pumping the oil out over the top?

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