Questions
Two circular discs A and B of equal masses and thickness but made of metals with densities dA and dB If their moments of inertia about an axis through the centre and normal to the circular forces be IA and IB, then.
detailed solution
Correct option is C
IA=mArA22 and IB=mBrB22∴ IAIB=rA2rB2 ∵ mA=mB………………(1)Now, mA=πrA2tdAmB=πrB2tdBSo, πrA2tdA=πrB2tdBOr rA2rB2=dBdA……………………..(2)IAIB=dBdAAs dA>dB hence IATalk to our academic expert!
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