The figure shows a hollow cube of side 'a' of volume V. There is a small chamber of volume 
in the cube as shown. This chamber is completely filled by m kg of water. Water leaks through a hole H and spreads in the whole cube. Then the work done by gravity in this process assuming that the complete water finally lies at the bottom of the cube is:
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
( 
mga)
Sol. Let h be the height of water surface, finally
a 2 h = a. 
. 
; h = 
C.M. gets lowered by a – 
= a – 
= 
Work done by gravity = mg 
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