Question
Why does a flywheel has most of its mass concentrated at the rim?
Solution
The Concentration of the mass at the rim increases moment of Inertia (I) of the flywheel. Is such a wheel gains or loses some K.E of rotation, 
, it brings about a relatively smaller change in its angular speed 
. Hence, such a flywheel helps in maintaining uniform rotation.
, it brings about a relatively smaller change in its angular speed . Hence, such a flywheel helps in maintaining uniform rotation.
