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Orbit of Artificial Satellites

Speed of a sa...

Question

Speed of a satellite with height.

A

increases

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B

decreases

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C

does not vary

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Solution

The correct option is B decreases
Speed of a satellite is given by:
$v = \sqrt{\frac{G M_{e}}{R_{e} + h}}$
where:
$G :$ Gravitational constant
$R_{e} :$ Radius of earth
$M_{e} :$ Mass of earth
$h :$ Height of satellite above the earth's surface

Clearly, speed of the satellite decreases with increase in height.

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