A hole is bored along a diameter of the earth and a particle is dropped into it. If R is the radius of the earth and g is the acceleration due to gravity at the surface of the earth, then the time period of oscillation of the particle is

A hole is bored along a diameter of the earth and a particle is droppe

1.	A hole is bored along a diameter of the earth and a particle is dropped into it. If R is the radius of the earth and g is the acceleration due to gravity at the surface of the earth, then the time period of oscillation of the particle is
Answer» `2pisqrt(R/g)` `2pisqrt((R)/(2g))` `2pisqrt((2R)/(g))` NONE of these Answer :A