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Question
An artificial satellite is moving in a circular orbit of radius nearly 42,250 km. Calculate its linear velocity, if it takes 24 hours to revolve round the earth
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Solution
Radius of orbit is 42250 km.
Distance covered by satellite to complete 1 revolution is 2 πr.
So distance is = 2 X 3.14 X42250 =265330 km.
time taken by satellite to complete one revolution is 24 hr = 24X60X60=86400 sec.
so linear velocity is= distance /time= 265330/86400 ms-1 = 3.07 km s-1.
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