Inner and outer radii of a spool are r and R respectively A

Last updated: 6/24/2023

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 fig then in case of pure rolling R A Thread unwinds spool rotates anticlockwise and friction act leftwards B Thread winds spool rotates clockwise and friction acts leftwards C Thread winds spool moves to the right and friction act rightwards D Thread winds spool moves to the right and friction does not come into existence