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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A particle of mass 10 g is kept on the surface of a uniform sphere of masss 100 kg and radius 10cm. Find the work to be done against the gravitational force between them to take the particel far away from the sphere (you may take G=6.67× 10^−11 N/m2 k g^2)

A particle of mass 10 g is kept on the surface of a uniform sphere of masss 100 kg and radius 10cm. Find the work to be done against the gravitational force between them to take the particel far away from the sphere (you may take G=6.67× 10^−11 N/m2 k g^2)

Find the percentage decrease in weight of a body when taken 16 km below the surface of the earth. Take radius of the earth as 6400 Km.