Two very small having mass `m` are atteched to two masses rods of length `l` Now these rods are joined it form `V` like figure having angle `60^(@)` This assumility is new higest in a verticle plane so that it can rotan without any friction about a horizontal axis perpendicular in the plane of figure) as shown in the figure The period of small oscilation of this asseamble is

Options

A. `2pi sqrt((2l)/(g))`
B. `2pi sqrt((2l)/(sqrt(3)g))`
C. `2pi sqrt((1)/(sqrt(3)g))`
D. `2pisqrt((sqrt(3)l)/(g))`

Answer

B

Explanation

`T = 2pi sqrt((2ml^(2))/(2mgl))cos 30^(@) = 2pi sqrt((2l)/(gsqrt(3))`