Suppose a hole is drilled completely through the earth along a diameter. Mass and radius of Earth are `M` and `R`. What is the force acting on a body of mass `m` at a distance `r` from the centre of Earth?

Suppose a holes is drilled completed through the earth along a dimeter. Mass and radius of Earth are M and R . What is the force acting on a body of mass m at a distance r from the centre of Earth?

A tunnel is dug along a diameter of the earth. Find the force on a particle of mass m placed in the tunnel at a distance x from the centre.

Energy required in moving a body of mass m from a distance 2R to 3R from centre of earth of mass M is

If a hole is drilled along the diameter of the earth and you leave a coin in the hole, then

What is meant by gravitational potential energy of a body ? Derive an expression for the gravitational potential energy for a body of mass m lying at a distance r from the centre of Earth.

A hole is drilled through the earth along a diameter and stone is dropped into it. When the stone is at the centre of the earth, it has finite (a) weight (b) acceleration (C) Potential Energy (D) Mass

What is the workdone in bringins a body of mass m from infinity to the surface of Earth of radius R and mass m ?

Imagine a hole drilled along the radius of the earth. A uniform rod of length equal to the radius (R) of the earth is inserted into this hole. Find the distance of centre of gravity f the rod from the centre .

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?