Question

Why rim of a fly wheel is made thick?
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Answer 1

Answer:

Most of the mass of a flywheel is concentrated at the rim so as to have moment of inertia same for the whole mass. If such a wheel gains or loses rotational energy, the change in the angular velocity is very small. Thus, a flywheel helps to maintain uniform motion

Answer 2

Answer:

Most of the mass of a flywheel is concentrated at the rim so as to have moment of inertia same for the whole mass. If such a wheel gains or loses rotational energy, the change in the angular velocity is very small. Thus, a flywheel helps to maintain uniform motion.