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Most Important Selected Qs for JEE AdvancedPhysicsMechanical Properties of Solids

A uniform rod is kept at smooth horizontal surface, a constant force is applied on the rod in horizontal direction at end ' A '. Find the ratio of energy stored per unit volume at end A to the energy stored per unit volume in the middle of rod.

Options

  1. A2
  2. B4
  3. C8
  4. D6

Correct answer

B. 4

Step-by-step solution

u= 1 2 ( stress )^2 Y Stress = Tension area U _ A U _ middle = T _ A ^2 ( ~T _ middle )^2 = F ^2 ( ~F / 2)^2 =4

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