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A slender uniform rod of mass M and length l is pivoted at one end so that it can rotate in a vertical plane (see the figure). There is negligible friction at the pivot. The free end is held vertically above the pivot and then released. The angular acceleration of the rod when it makes an angle θ with the vertical, is
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Satendra Kumar , 7 Years ago
Grade 12th pass
anser 1 Answers
Arun
Dear Satendra
 
Taking torque about pivot T = I * \large \alpha
 
mg sin (theta) * l/2 = ml² * \large \alpha/3
 
\large \alpha = 3g sin (theta) /2l
 
Hence option D is correct
 
Last Activity: 7 Years ago
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