A small body is at a distance `r` from the centre of the mercury, where `r` is greater than the radius of the mercury. The energy required to shift the body from `r` to `2r` measured from the centre is `E`. The energy required to shift it form `2r` to `3r` will be

The energy required to shift the body revolving around a planet from r to 2r is E . The energy required to shift it from 2r to 4r is (measured from centre of planet)

A small body is initially at a distance r from the centre of earth. r is greater than the radius of the earth. If it takes W joule of work to move the body from this position to another position at a distance 2r measured from the centre of earth, how many joule would be required to move it from this position to a new position at a distance of 3r from the centre of the earth.

The potential at a distance R//2 from the centre of a conducting sphere of radius R will be

The gravitational potential energy of a body at a distance r from the centre of the Earth is U where r gt R (radius of Earth). What is the weight of body at the point ?