Question:
A satellite of mass $1000 \mathrm{~kg}$ is supposed to orbit the earth at a height of $2000 \mathrm{~km}$ above the earth's surface. Find
(a) its speed in the orbit,
(b) its kinetic energy,
(c) the potential energy of the earth-satellite system and
(d) its time period. Mass of the earth $=6 \times 1024 \mathrm{~kg}$.
Solution:
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