Geography, 19.07.2019 19:30 terrickaimani

Asolid sphere of uniform density and radius r applies a gravitational force of attraction equal to fi on a particle placed at a distance 3r 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 cavity now applies a gravitational force f, on the same particle. the ratio f/f is

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