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AP EAMCET2004PhysicsMechanical Properties of Solids

A metallic ring of radius r and cross sectional area A is fitted into a wooden circular disc of radius R(R>r) . If the Young's modulus of the material of the ring is Y , the force with which the metal ring expands is

Options

  1. AA Y R r
  2. BA Y(R-r) r
  3. CY(R-r) A r
  4. DY R A R

Correct answer

B. A Y(R-r) r

Step-by-step solution

aligned & Y= F A L l & Force F= A Y l L = A Y[2 (R-r)] 2 r & F= A Y(R-r) r aligned

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