If an object is to rest on an incline without slipping, then friction must equal the component of the weight of the object parallel to the incline. This requires greater and greater friction for steeper slopes. For a static coefficient ?s = 0.78 between the incline and the tires, what is the maximum angle of the incline above the horizontal for which a parked car will not slide down? Assume that a = 0 and that static friction has reached its maximum value. Provide your answer in degrees to one decimal place.
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