Q.
A thin uniform rod of mass M and length L is hinged at an end and released from rest in the horizontal position. The tension at a point located a distance L/3 from the hinge point, when the rod becomes vertical, will be
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a
b
c
d
2Mg
answer is D.
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Detailed Solution
When the rod becomes vertical, apply conservation of energy
Centre of mass of lower two third part moves in a circle of radius 2L/3.
We can apply Newton’s second law on this part
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