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Copycat91
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Homework Statement
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.
http://3.bp.blogspot.com/_jn57XA2jL...41pJXdRc/s1600-h/Get+Ball+Out+from+Water.jpg"
Calculate work required to get the ball out from the water!
Ignore viscosity and surface tension.
Homework Equations
Fbuoy = ρgV
Fgrav = -mg
The Attempt at a Solution
I have found its answer, W = mgr, but http://collectionofphysicsproblems.blogspot.com/" , it says there's a tricky solution.
I hope anyone could help on finding the tricky solution.
Thanks.
http://collectionofphysicsproblems.blogspot.com/"
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