A solid spherical planet of mass 2m and radius R has a very

Last updated: 6/9/2023

A solid spherical planet of mass 2m and radius R has a very small tunnel along its diameter A small cosmic particle of mass m is at a distance 2R from the centre of the planet as shown Both are initially at rest and due to gravitational attraction both start moving toward each other After some time the cosmic particle passes through the centre of the planet Assume the planet and the cosmic particle are isolated from other planets 2m A Displacement of the cosmic particle till that instant is 4R C B Acceleration of the cosmic particle at that instant is zero 3 18Gm C velocity of the cosmic particle at that instant is voo otal work do 2R V 3R 2