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An artificial satellite is moving in a c...

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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The correct Answer is:
speed `=3.07 km s^(-1)`
Radius of the circular orbit, r = 42250 km
Time taken to revolve around the earth, t = 24h
Speed of a circular moving object, v = (`2pir`)/t
= `[2xx(22//7)xx42250xx1000]//(24xx60xx60)`
= `(2xx22xx42250xx1000)//(7xx24xx60xx60)` m `s^(-1)`
= 3073.74 m `s^(-1)
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