Question

Two discs have same mass and thickness. Their
materials have densities d, and d.The ratio of
their M.I. about central axis will be
1) d1:d2 2) d1 d2:1 3) 1:d1 d2 4) d2:d1


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Answer 1

Explanation:

I think there is a problem in question

.....sorry.....

Answer 2

Answer:

d2/d1

Sol

d1 = M/A1

A1= Area - πr1^2 x1

d2 = M/A2

A2= πr2^2 x2 (x2=x1)

Then

(r1/r2)^2 = d2/d1

MI1/MI2=

Mr1^2/Mr2^2

ANS

d2/d1

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