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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two satellites s1 and s2 revolve around a planet in coplanar circular orbits in the same sense. THeri periods of revolution are 1 hour and 8 hour respectively. The radius of the orbit of s1 is 10^4 km. The speed of S2 relative to S1 when they are closest (in km/h ) is

Two satellites s1 and s2 revolve around a planet in coplanar circular orbits in the same sense. THeri periods of revolution are 1 hour and 8 hour respectively. The radius of the orbit of s1 is 10^4 km. The speed of S2 relative to S1 when they are closest (in km/h ) is

The change in the value of g at a height h above the surface of earth is the same as at a depth d below the earth. When both d and h are much smaller than the radius of earth then which one of the following is correct?