# Chapter-8(Gravitation) ## Geostationary and Polar Satellite

1. Geostationary Satellite The satellite in a circular orbits around the earth in the equatorial plane with T=24 hours are called geostationary satellite or Geosynchronous satellite. These satellite always stay over the same place above the earth, such a satellite is never at rest and appears stationary due to its zero relative velocity with respect … ## Energy Of An Orbiting Satellite

When a satellite revolves around a planet in its orbit, it posses both potential energy (Due to its position against gravitational pull of the earth) and kinetic energy (Due to orbital motion). If m is mass of the satellite and v is its orbital velocity, then kinetic energy of satellite Satellite are always at finite … ## Earth Satellites

A satellite is a body which is constantly revolving in an orbit around a comparatively much larger body. Example:– The moon is a natural satellite while INSAT-B is an artificial satellite. As we know that centripetal force required for circular orbit is given by Thus from the above it is satisfied to the Kepler’s law … ## Gravitational Potential

Gravitational potential at a point in the gravitational field is defined as the amount of work done in bringing a body of unit mass from infinity to that point without acceleration. Negative sign indicate that the direction of intensity is in the direction where the potential decreases. It is a scalar quantity and it’s SI … ## Acceleration Due To Gravity Below The Earth’s Surface

We assume the earth to be a homogeneous sphere. Let ρ be the mean density of the earth and a body be lying on the surface of the Earth, where the value of the acceleration due to gravity is g. Now, the body be taken to a depth d below the free surface of the … ## Acceleration Due To Gravity Above The Surface Of Earth

Let a body of mass m lying on the surface of the earth of mass M and radius R. As we know that acceleration due to gravity at the surface of the earth Let the body is taken to a height h above the surface of the Earth where the value of the acceleration due …

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