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

A stone tied to a string of length L is whirled in a vertical circle,

1.	A stone tied to a string of length L is whirled in a vertical circle, with the other end of the string at the centre. At a certain instant of time, the stone is at its lowest position, and has a speed u. The magnitude of change in its velocity as it reaches a position, where the string is horizontal is
Answer» `SQRT( u^2-2 GL)` `sqrt(2GL)` `sqrt(u^2 - gL)` `sqrt(2(u^2 -gL))` SOLUTION :`sqrt(2(u^2 -gL))`