A raindrop of mass 1 g falling from a height of 1 km hits the ground with a speed of 
. If the resistive force is proportional to the speed of the drop, then the work done by the resistive force is: (Take 
)
Text Solution
Verified by ExpertsThe correct answer is:
D
: Here, 
kg
H=1km = 1000 m = 
The change in kinetic energy of the drop is
The work done by the gravitational force is
According to work-energy theorem
Where 
is the work done by the resistive force on the raindrop. Thus
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