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  4. A hollow cylinder with inner radius R , outer radius 2R and mass M is rolling with speed of it's axis v . Its kinetic energy is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-bset3oayccamijjb.jpg />

Q. A hollow cylinder with inner radius , outer radius and mass is rolling with speed of it's axis . Its kinetic energy is

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Solution:


...(1)
Consider solid cylinder of radius and mass , from which a cylinder of radius of mass is taken out from a common axis.
Mass of hollow cylinder


... (2)

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