What is gravitational potential energy at a point? How much of work is done in shifting mass from the surface to a height equal to its radius?

If g is the acceleration due to gravity on the earth’s surface, the gain in the potential energy of an QBject of mass m raised from the surface of the earth to a height equal to the radius R of the earth is :

How much work is done on a body of mass m in moving it around a horizontal circle of radius R?

What is the potential energy of an object of mass 'm' at a height 'h'?

Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0 m apart on a horizontal table. What is the gravitational force and potential at the mid point of the line joining the centers of the spheres? Is an object placed at that point in equilibrium? If so, is the equilibrium stable or unstable?

How much work is done when a charge q moves over an equipotential surface?

How much work does a boy of mass 50kg do when he climbs a height 30 metre.

How much work is done in moving a charge of 4C across two points having a potential difference 24V?

What will be the potential energy of a body when its mass becomes doubled.

‘What is the work done by earth's gravitational force in keeping the moon in its orbit?

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 xx 10^24 kg, radius = 6400 km