Question

it's urgent.

two circular discs A and B of same mass and same thickness are made of two different metals whose densities are da and db(da>db). their moments of inertia about the axis passing through their center of gravity and perpendicular to their planes are Ia and Ib. which is greater Ia or Ib

Answer 1

hey frind

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Moment of in tertia think is

1=1/2 mr2 ( Mr squire )

now if MA=MB

Aa×Ap=Bb×Bp

Aa thickness is same both of them

now if

pa>pb than Ab>Aa

so

Rb>Ra where R is the Radius.

so ib>ia