A circular platform is free to rotate in a horizontal plane about a vertical axis passing through

Описание: Only one option is correct [IIT-JEE 2002]

A circular platform is free to rotate in a horizontal plane about a vertical axis passing through its centre. A tortoise is sitting at the edge of the platform. Now, the platform is given an angular velocity ω0. When the tortoise moves along a chord of the platform with a constant velocity (with respect to the platform), the angular velocity of the platform ω(t) will vary with time t as –