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# Gravitation

Kepler's laws of planetary motion, universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth. Gravitational potential energy and gravitational potential, escape velocity, orbital velocity of a satellite, Geo-stationary satellites.

### Earth satellite

: A satellite is a body which is revolving continuously in an orbit around a comparatively much larger body. The orbital speed of satellite is...

### Gravitational potential

The gravitational potential at a point in a gravitational field is defined as the amount of work done in bringing a body of unit...

### Gravity: The Gravitational Force of earth

It is the force of attraction exerted by earth towards its centre on a body lying on or near the surface of the earth....

### Universal law of Gravitation

Gravitation is the name given to the force of attraction acting between any two bodies of the universe. Newton’s reasoning was that the moon revolving...

### Kepler’s law of planetary motion

The three laws of Kepler can be stated as follows: Kepler’s first law (law of orbit): Every planet revolves around the sun in an elliptical orbit...