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[" A stone tied to a string of length L ...

[" A stone tied to a string of length L is whirledin "],[" vertical circle with the other end of the string,"],[" the centre.At a certain instant of time,the sto "],[" is at its lowest position,and has a speed u."],[" magnitude of the change in its velocity an "],[" reagnitude of the change in its velocity an "],[" reagnitude of the change in its velocity an "],[" reaches a position where the string is horizal "],[" reaches a position where the string is horizal "],[" is: "],[[" (1) "sqrt(u^(2)-2gL)," (4) "sqrt(2(u^(2)-9L))]],[" (3) "sqrt(u^(2)-9L)]

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