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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F 1 ​ on a particle placed at a distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with the cavity now applies a gravitational force F 2 on the same particle. The ratio F 1 ​/F 2 ​ is

A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F 1 ​ on a particle placed at a distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with the cavity now applies a gravitational force F 2 on the same particle. The ratio F 1 ​/F 2 ​ is

The radius of a planet is R. A satellite revolves around it in a circle of radius r with angular velocity ω 0 . The acceleration due to the gravity on planet's surface is