Homework Help: physics

Posted by kala on Monday, February 4, 2013 at 2:20am.

a metallic ring of radius 'r' and cross sectional area is fitted into an wooden circular disc of radius R (R greater than r).If he young's modulus of the material of the ring is Y, the fore with which the metal ring expands is :
ans:
1.AY(R-r)/r

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