An artificial satellite is moving in a circular orbit around the earth with a speed equal to hal...

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An artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of escape velocity from the surface of earth. (Radius of earth \( =6400 \mathrm{~km} \) )
(a) Determine the height of the satellite above the earths surface.
(b) If the satellite is stopped suddenly in its orbit and allowed to fall freely on the earth, find the speed with which it hits the surface of earth.
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