# An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

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Given: An artificial satellite is moving in a circular orbit of radius 42250 km.

To do: To calculate its speed if it takes 24 hours to revolve around the earth.

Solution:

The radius of the orbit $= 42250\ km$

Circumference of the orbit $= 2\pi r$

$=2\times3.14\times42250$

$=2.66\times10^{5}\ km$

The time taken to complete one revolution around the earth is 24 hour

Speed $=\frac{DISTANCE}{TIME}$

$=\frac{2.66\times 10^{5}}{24}$

$=11083.333\ km/h$
Updated on 10-Oct-2022 13:22:24