1.

A particle of mass 'm' is suspended from a ceiling through a string of length 'L'. If the particle moves in a horizontal circle of radius 'r' as shown in the figure, then the speed of the particle is

Answer»

`r SQRT((G)/(sqrt(L^(2)-r^(2))))`
`g sqrt((r )/(sqrt(L^(2)-r^(2))))`
`r sqrt((g)/(L^(2)-r^(2)))`
`g sqrt((r )/(L^(2)-r^(2)))`

ANSWER :A


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