A stone is tied to a string of length 'l' and is whirled in a vertical circle with the other end of
Channel: Ritesh Dahiya (RD Sir) (KDC) Kota Doubt Counter
Date: 2021-02-02

A stone is tied to a string of length 'l' and is whirled in a vertical circle with the other end of the string as the center. At a certain instant of time, the stone is at its lowest position and has a speed 'u'. The magnitude of the change in velocity as it reaches a position where the string is horizontal (g being acceleration due to gravity) is :-

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