A ball of mass 1 kg falls from a height of 5 m above the free surface of water. The relative density of the solid ball is 
. The ball travels a distance of 2 m under water and becomes stationary. The work done by the resistive forces of water is
Text Solution
Verified by ExpertsThe correct answer is:
C
From work-energy theorem,
work done by all the forces = change in kinetic energy.
(Work done by gravity for 7 m) + (Work done by upthrust for 2 m ) + (Work done by resistive forces) 
as 
+ Work done by resistive forces 
Work done by resistive forces 
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