A circular turn table has a block of ice placed at its centre. The system rotates with an angular speed w about an axis passing through the centre of the table. If the ice melts on its own without any evaporation, the speed of rotation of the system

Options

A. becomes zero
B. remains constant at the same value `omega`
C. increases to a value greater than `omega`
D. decrease to a value less than `omega`

Answer

D

Explanation

Melting of ice produces water which will spread over larger distance away from the axis of rotation. This increases the moment of inertia so angular velocity decreases