College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

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A solid cylinder and an annular cylinder of equal mass are rolling on the floor with the same speed. (a) If the solid cylinder's radius is equal to the annular cylinder's inner radius, which cylinder would be harder to stop Explain, (b) would it make any stopping difference if the solid cylinder's radius were equal to the annular cylinder's outer radius Justify your answer explicitly.