1. A stone is tied to a string of length ' and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time the stone is at its lowest position and hasa 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) i:s

1. A stone is tied to a string of length ' and is whirled in a vertica

1.	1. A stone is tied to a string of length ' and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time the stone is at its lowest position and hasa 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) i:s
Answer» 1. A stone is tied to a string of length ' and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time the stone is at its lowest position and hasa 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) i:s

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