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Question

Two points P and Q, diametrically opposite on a disc of radius R have linear velocities v and 2v as shown in figure. Find the angular speed of the disc.
1391414_287bf22dfb04410f8c2025d6ce6587d9.png

A
vR
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B
2vR
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C
v2R
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D
v4R
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Solution

The correct option is B v2R
μ=UrPQ=2VV2R=V2R Rotation is clock wise so ω is perpendicular to paper inward

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