MHT CET 2024 Physics question
A satellite is revolving around a planet in a circular orbit close to its surface. Let be the mean density and 'R' be the radius of the planet. The period of revolution of the satellite is (G = universal constant of gravitation)
Answer: (C)
Solution
For an orbit close to the surface the orbital radius is , and gravity supplies the centripetal force: , so . The mass in terms of density is . Substituting, \sqrt\dfracR^3$·
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