A ball with a diameter of 20.00 cm is placed in water with 75% of its volume above the surface of the water. The buoyant force of the water on the ball is
A) 16.67 N.
B) 14.75 N.
C) 13.60 N.
D) 12.56 N.
E) 10.26 N.

Question

Quizplus · Accepted Answer

The buoyant force is equal to the weight of the displaced water. Since 25% of the ball's volume is submerged, the volume of displaced water is 0.25 * (4/3)π(0.1 m)^3. The density of water is 1000 kg/m^3, so the buoyant force is 0.25 * (4/3)π(0.1)^3 * 1000 * 9.8 = 10.26 N.

A Ball with a Diameter of 20