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A coil is wound with a thread on it lies on a horizontal table. Coil inner radius is $r$ , the external $R$ . The coils roll purely on the surface. In both cases, thread is being pulled with same velocity $u$ .

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The velocity of center of mass is more in first case.

The angular velocity of the body is more in second case

The velocity of center of mass is more in second case

The angular velocity of the body is more in first case

answer is A, D.

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Detailed Solution

$(i) u = V_{CM} - rω$

$(ii) u = V_{CM} + rω$ and $ω = \frac{V_{CM}}{R}$ in both cases.

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