A uniform ring of mass m and radius r is placed directly above a uniform sphere of mass M and of equal radius The centre of the

Question

A uniform ring of mass m and radius r is placed directly above a uniform sphere of mass M and of equal radius The centre of the ring is directly above the centre of the sphere at a distance r 3 as shown in the figure The gravitational force exerted by the sphere on the ring will be GMm a b 8p GMm 8 c 3 d GMm 4p GMm 8r 3 T 3r 2r

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