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Q.

Two metal spheres each of radius ‘r’ are kept in contact with each other. If d is the density of the material of the sphere, then the gravitational force between those spheres is propositional to

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a

d2r4

b

d2r4

c

r4d2

d

d2r6

answer is B.

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Detailed Solution

Question Image

d=2r       ρ=d

m=vρ

=43π r3.d

F=G(43π)2r6d2(2r)2

F=K r4d2

F∝d2r4

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