What is Polar Satellites?

What is Polar Satellites?

The polar satellites revolve around the Earth in a north-south orbit passing over the poles as the Earth spins about its north-south axis. It is a…
Uses of Satellites

Uses of Satellites

Uses of satellites: (i) Satellite communication: Communication satellites are used to send radio, television and telephone signals over long distances. These satellites are fitted with…
Explain on Weightlessness

Explain on Weightlessness

Television pictures and photographs show astronauts and objects floating in satellites orbiting the Earth. This apparent weightlessness is sometimes explained wrongly as zero-gravity condition. Consider…
Explain on Geo-stationary Satellites

Explain on Geo-stationary Satellites

A geo-stationary satellite is a particular type used in television and telephone communications. A number of communication satellites which appear to remain in fixed positions…
Energy of an Orbiting Satellite

Energy of an Orbiting Satellite

A satellite revolving in a circular orbit round the Earth possesses both potential energy and kinetic energy. If h is the height of the satellite…
What is Gravitational Mass?

What is Gravitational Mass?

Gravitational mass is the mass of a body which determines the magnitude of gravitational pull between the body and the Earth This is determined with…
What is Inertial Mass?

What is Inertial Mass?

Inertial mass of a body is a measure of the ability of a body to oppose the production of acceleration in it by an external…
Equation for Gravitational Potential Energy near the surface of Earth

Equation for Gravitational Potential Energy near the surface of Earth

Let the mass of the Earth be M and its radius be R. Consider a point A on the surface of the Earth and another…
Explain Gravitational Potential Energy

Explain Gravitational Potential Energy

Consider a body of mass m placed at P at a distance r from the centre of the Earth. Let the mass of the Earth…
Expression for Gravitational Potential at a Point

Expression for Gravitational Potential at a Point

Consider a body of mass M at the point C. Let P be a point at a distance r from C. To calculate the gravitational…
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