Two uniform circular discs are rotating independently in the same direction around their common axis passing through their centres. The moment of inertia and angular velocity of the first disc are0.1kg 
and 10 rad 
respectively while those for the second one are 0.2kg 
and 5rad 
respectively. Atsome instant they get stuck together and start rotating as a single system about their common axis with some angular speed. The kinetic energy of the combined system is:
A
J
B
J
C
J
D
J
Text Solution
Verified by ExpertsThe correct answer is:
A
JEE Main 2020
rad/s
K.E. 
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