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[" 3.A solid sphere of mass "M" and radi...

[" 3.A solid sphere of mass "M" and radius "R" has a spherical "],[" cavity of radius "(R)/(2)" such that the centre of cavity is at a "],[" distance "(R)/(2)" from the centre of the sphere."A" point mass "m],[" is placed inside the cavity at a distance "(R)/(4)" from the centre "],[" of sphere.The gravitational force on mass "m" is "],[[" (a) "(1[Mm)/(R^(2))," (b) "(14GMm)/(R^(2))],[" (c) "(GMm)/(2R^(2))," (d) "(GMm)/(R^(2))]]

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