A) The time period of \[{{S}_{1}}\] is four times that of \[{{S}_{2}}\]
B) The potential energies of earth and satellite in the two cases are equal
C) \[{{S}_{1}}\] and \[{{S}_{2}}\] are moving with the same speed
D) The kinetic energies of the two satellites are equal
Correct Answer: C
Solution :
Key Idea: In same orbit, orbital speed of satellites remains same. |
When two satellites of earth are moving in same orbit, then time period of both ate equal. |
From Kepler's third law |
Time period is independent of mass, hence their time periods will be equal. |
The potential energy and kinetic energy are mass dependent, hence the PE and KE of satellites are not equal. |
But, if they are orbiting in a same orbit, then they have equal orbital speed. |
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