Explanation
Melting of ice produces water which will speed over larger distance away from the axis of rotation. This increases the moment of inertia so angular velocity decreases.
M.I decreases and angular velocity increases.
Since vC.M = 0 so it's linear momentum = 0
L = Iω
In this process I decreases and ω increases.
In the absence of external torque angular momentum remains constant.
Since net external torque is equal to the rate of change of angular momentum.
As man walks towards axis of rotation. Moment of inertia of system decreases so that angular velocity increases.
It's always in axial direction.
Graph should be parabola symmetric to I-axis, but it should not pass from origin because there is a constant value Icm is present for x = O.
Sphere possesses both translational and rotational kinetic energy.
Hollow cylinder will take more time to reach the bottom because it posses larger moment of inertia.
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