Questions
A disc is rotating about its own axis with angular frequency 100 rpm. When a mass of 100 g is placed at l0 cm from its centre then its angular frequency becomes 50 rpm. The moment of inertia of the disc is :
detailed solution
Correct option is B
By conservation of angular momentumI(100) = I(50) + 100 x (10)2(50) I = 104 gcm2Talk to our academic expert!
Similar Questions
Two discs have mass ratio 1 : 2 and diameter ratio 2 : 1, then find the ratio of their moments of inertia.
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