A particle of mass m lies at a distance r from the centre of earth. The force of attraction between the particle and earth as a function of distance is F(r ),

A shell of mass M and radius R has another point mass m placed at a distance r from its centre (r gt R) . The force of attraction between the shell and point mass is :

A particle of mass m is ocated at a distance r from the centre of shell of mass M and radius R. The force between the shell and mass F (r ) . The plot of F(r ) ve r is :

A satellite of mass m is placed at a distance r from the centre of earth (mass M ). The mechanical energy of the satellite is

A satellite of mass m is revolving around the earth at a distancer r from the centre of the earth. What is its total energ?

A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite B of mass 2m is at distance of 2r from the earth's centre. Their time periode are in the ratio of

A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite B of mass 2m is at distance of 2r from the earth's centre. Their time periode are in the ratio of

(a) A tunnel is dug along a diameter of the earth. Find the force on the a particle of mass m placed in the tunnel at a distance x from the centre. (b) A tunnel is dug along a chord of the earth at a perpendicular distance R//2 from the earth's centre. the wall of the tunnel may be assumed to be frictionless. Find the force exerted by the wall on a particle of mass m when it is at a distance x from the centre of the tunnel.