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The magnitudes of the gravitational force at distances  r1 and  r2 from the centre of a uniform sphere of radius R and mass M are F1  and  F2 respectively. Then

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By Expert Faculty of Sri Chaitanya
a
F1F2=r1r2 if r1
b
F1F2=r12r22 if r1>R and r2>R
c
F1F2=r1r2 if r1>R and r2>R
d
F1F2=r22r12 if r1

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detailed solution

Correct option is A

g=43πρGr ∴g∝r  if rR If r1R and r2>R then F1F2=g1g2=r2r12


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