A thin circular metal disc of the radius 500 mm is set rotating about a central axis normal to its plane. Upon raising in temperature gradually, the radius increases to 507. 5 mm. The percentage change in the rotational kinetic energy will be
Text Solution
Verified by ExpertsThe correct answer is:
D
-3%
Given 
Now, 
or, 
Taking log and differentiating, 
or, the percentage change in 
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