Buoyancy: A cylinder, semicircular in cross-section, is 10 m long and 5.0 m in radius. It is completely submerged, with its flat bottom side horizontal and 8.0 m below the water surface, as shown in the figure. What is the magnitude of the net force on the curved upper surface of the half-cylinder? Neglect atmospheric pressure.
A. 2.0 × 106 N
B. 2.5 × 106 N
C. 3.0 × 106 N
D. 3.5 × 106 N
E. 4.0 × 106 N
Answer: E
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