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A semi-circular disc rests on a horizontal surface with its top...

This question belongs to Civil Engineering Strength Of Materials
Strength of Materials
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A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

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Correct Answer: Option C
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