Chapter - 1 Motion

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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.


Radius of the circular orbit, r = 42250 km

Time taken to revolve around the earth, t = 24 h

Speed of a circular moving object, v = frac{2pi r}{t}

v= frac{2 	imes 3.14 	imes 42250}{24}

v= 1.105 	imes 10^4 km/h

v=3.069 km/s

Hence, the speed of the artificial satellite is 3.069 km/s.

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