A tunnel is dug along a diameter of earth. IF M is mass of the earth, then force on a particle of mass m placed in that tunnel at a distance x from the centre is

A tunnel is dug along a diameter of earth. IF M is mass of the earth,

1.	A tunnel is dug along a diameter of earth. IF M is mass of the earth, then force on a particle of mass m placed in that tunnel at a distance x from the centre is
Answer» `(GMmx)/(R^(3))` `(GMmx)/(R^(2))` `(GMm)/(R^(3))` `(GMmR)/(x^(3))` ANSWER :A