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Choose the correct option: Inner and o...

Choose the correct option:
Inner and outer radii of a spool are r And R respectively. A thread is wound over its inner surface and placed over a rough horizontal surface. Thread is pulled by a force F as shown in the figure. Then in case of pure rolling.

A

(a) thread unwinds, spool rotates anticlockwise and friction leftwards

B

(b) thread winds, spool rotates clockwise and friction leftwards

C

(c) thread winds, spool moves to the right and friction acts rightwards

D

(d) thread winds, spool moves to the right and friction does not come into existence

Text Solution

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The correct Answer is:
B
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