find the volume of the ball (sphere)
mass = volume * density
forces on the ball
... gravity ... downward ... m * g
... buoyancy ... upward ... equal to mass of water displaced times g
(ball volume) * (water density) * g =
... [(ball mass) * g] + (hold down force)
A ball has a diameter of 3.89 cm and average density of 0.0842 g/cm3. What force is required to hold it completely submerged under water?
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