A) Greater than the work done by air friction in the second 100 m
B) Less than the work done by air friction in the second 100 m
C) Equal to 100 mg
D) Greater than 100 mg
Correct Answer: B
Solution :
In the first 100 m body starts from rest and its velocity goes on increasing and after 100 m it acquire maximum velocity (terminal velocity). Further, air friction i.e. viscous force which is proportional to velocity is low in the beginning and maximum at \[v={{v}_{T}}\]. Hence work done against air friction in the first 100 m is less than the work done in next 100 m.
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