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Grade 11IIT JEE Entrance Exam

A stone tied to a string of length L is whirled in a vertical circle and other end of a string is at the centre. at a certain instant of time, the stone is at its highest position, and has a speed u. The magnitude of change in the velocity has it reaches a position where string is horizontal is

Sudhanva G V

7 Years agoGrade 11

1 Answer

Arun

7 Years ago

Dear student

The portion of Velocity change –

change in velocity = v jcap – u icap

and the magnitude of change in velocity =>

whole uder-root ( Vsquare + U square + 2 * V * U * Cos90 )

=> whole under-root (Vsquare+Usquare +0 ) (as cos90 = 0)

=> whole under-root (Vsquare+Usquare)

So, we have to find the value of (Vsquare+Usquare) ,i.e.,

whole under-root [2*{U square – gl }]

Regards Arun

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