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Question

Two uniform rods of equal length but different masses are rigidly joined to form an L - shaped body which is pivoted about point O as shown. If in the shown configuration, the body is in equillibrium, the ratio M/m will be.


A
2
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B
3
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C
2
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D
13
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Solution

The correct option is B 3
In equilibrium, torque of forces mg and Mg about an axis passing through O balance each other.
MgL2sin30=mgL2sin60
Mm=3

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