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Calculate curb height a car can negotiate

A car is stopped with its front wheels resting against a curb when its driver starts the engine and tries to drive over the curb. Knowing that the radius of the wheels is 280 mm, that the coefficient of static friction between the tires and the pavement is 0.90, and that 60 percent of the weight of the car is distributed over its front wheels and 40 percent over its rear wheels, determine the largest curb height h that the car can negotiate:

(a) assuming front-wheel drive.
(b) assuming rear-wheel drive.

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