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A steel rod of length L, density d and cross-sectional area A, is hinged at one end so that it can rotate freely in a vertical plane. The rod is released from a horizontal position. When it becomes vertical, the stress at its midpoint isA. 13dLg/8B. 12dLg /8C. 2dL g/5D. dLg/2 |
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Answer» Correct Answer - 1 `mg1/2 =1/2xx(ml^(2))/3 omega^(2)` `omega=sqrt((3g)/L)` `T-m/(2g)=m/2 omega^(2)xx(3L)/4` `T=(mg)/2+3/8xx3 mg =(13 mg)/8` |
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