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MHT CET 2021 (23 Sep, Shift 2) · Satellites - Orbital Velocity & Period

Satellites - Orbital Velocity & Period question from MHT CET 2021 (23 Sep, Shift 2)

Q42MHT CET 2021 · 23 SEP · SHIFT 2Easy

Satellites - Orbital Velocity & Period

The time period of a satellite of earth is 5 hours. If the separation between the earth and the satellite is increased to four times the previous value, the new time period of the satellite will be

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Answer: (b)

Kepler's third law: $T \propto r^{3/2}$ .
$T' = 5 \times 4^{3/2} = 5 \times 8 = 40$ hours
So the answer is (b) 40 hours.

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