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Class 11 NEET Physics System of Particles and Rotational Motion

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Question : 83

Total: 113

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 centre. 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

√2(u2−gl)
√u2−gl
u−√u2−2gl
√2gl

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