Energy is stored in a flywheel made from steel disc with mass m$1[$kg$],$ radius R$1[$m$],$ rotating at n$1[$rpm$].$ It was decided to change the rotation speed to n$2=1\mathrm{.}5*$n$1.$ Calculate the factor F$=$R$2/$R$1$ such that the flywheel with new radius R$2[$m$]$ will store the same amount of energy as the original flywheel, if both flywheels have the same mass, m$1=$m$2.$

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To calculate the factor F R2R1 we need to consider the conservation of energy in the ... View the full answer