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

A stone is tied to a string of length l and is whirled in a vertical c

1.	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
Answer» 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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