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The weight of a body is the force with which it is attracted toward the centre of the earth. When a body is stationary with respect to the earth, it’s weight equals to the gravity. This weight of the body is known as its static or true weight. At one particular position, the two gravitational […]

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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

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Escape Speed

Escape speed on the earth is defined as the minimum speed with which a body should be projected vertically upwards from the surface of the earth so that it just escapes out from gravitational field of the earth and never return on its own. Let a body of mass m lying at distance x from

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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

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