Momentum and CollisionHard
Question
A solid right cylinder of length stands upright at rest on the bottom of a large tub filled with water up to height h as shown in the figure-I. Density of material of the cylinder equals to that of water. Now the cylinder is pulled slowly out of water with the help of a thin light inextensible thread as shown in figure-II. Find the work done by the tension force develop in the thread.
Options
A.mgh
B.mgl
C.0.5 mgl
D.mg(0.5l + h)
Solution
Work done by tension force = work done by gravity = 0.5 mgl
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