An artificial satellite is placed into a circular orbit around earth at such a height that it always remains above a definite place on the surface of earth. Its height from the surface of earth is
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a
6400 km
b
4800 km
c
32000 km
d
36000 km
answer is D.
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Detailed Solution
mrω2=GMmr2 r=R+h=GMT24π21/3 T=24h R=6400km G=6.67×10-11Nm2kg-2Substituting the values we geth=36000 km (approx)