A satellite revolving in a circular equatorial orbit from west to east appears over a certain point on the equator every 8 hours. Therefore it's period is
A
16 hr
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B
8 hr
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C
6 hr
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D
32 hr
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Solution
The correct option is C 6 hr
Earth rotates from W→E
T = 24 hrs we=2π24
According to the information, the angular velocity of satellite with respect to the earth is 2π8 ws−we=2π8 ws=2π8+2π24 ws=2π×424 ws=2π6 ws=2πT=2π6
T = 6 hrs