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A solid ball with radius r and mass m is located inside an opened wide tank filled with water. The ball has the same density with water.
Calculate work required to get the ball out from the water!Ignore viscosity and surface tension. Gravity acceleration is g.

(Don't use straight-forward method, this problem doesn't need integration at all)

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1 comments

Anonymous said... @ January 27, 2011 at 5:14 AM

mgr

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