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What is the buoyant force on a beach ball of diameter 20.0 cm that is HALF...

What is the buoyant force on a beach ball of diameter 20.0 cm that is HALF submerged in a fresh water pool?

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Answer #1

The buoyant force on a beach ball is balanced with the weight of the water after half of it mass submerged in water.

          FB = (1/2)mwg

                 = (1/2)(Dw)(Vw)g

                 = (1/2)Dw[4/3*pi*r3]*g

                  = (2/3)*pi*Dw*r3*g

                  = (2/3)*pi*(1000 kg/m3)(10x10-2 m)3*(9.8 m/s2)

                  = 20.52 N

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