Arigid body is rotating counterclockwise about a fixed axis. each of the following pairs of quantities represents an initial angular position and a final angular position of the rigid body. which of the sets can occur only if the rigid body rotates through more than 180?

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel