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Maximum tensile stress that a material can withstand is . A rod of mass m having uniform cross sectional area, made of the above mentioned material is freely suspended from one end. Then find its minimum diameter.
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Correct option is D
Maximum stress is developed in the topmost section. ∴π4d2σ=mg⇒d=4mgπσSimilar Questions
One face CD of a brass cube ABCD having length of side 10 cm is fixed and a tangential force is applied on the free face A. As a result the angular displacement of the other face is 0.18o. If shear modulus of brass is , the elastic potential energy stored in the cube is
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