A brick is positioned first with its largest surface in contact with an inclined plane. The plane is tilted at an angle to the horizontal until the brick just begins to slide, and the angle, 9, of the plane with the horizontal is measured. Then the brick is turned on one of its narrow edges, the plane is tilted, and 9 is again measured. Predict whether there will be a difference in these measured angles. Explain your answer in terms of the equation for the force of friction. Is the coefficient of static friction affected by the area of contact between the surfaces?