1.

Inner and outer radii of a spool are r and R, respectively. A thread is wound over its inner surface and spool is placed over a rough horizontal surface.Thread is pulled by a force F as shown in Figure. In case of pure rolling, which of the following statements are possible to be correct

Answer»

Thread unwinds, SPOOL rotates anticlockwise and FRICTION acts left WARDS
Thread winds, spool rotate clockwise and friction acts leftwards
Thread winds, spool moves to the right and friction acts RIGHTWARDS.
Thread winds, spool moves to the right and friction come into existance.

ANSWER :A::C::D


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