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- F1/F2=r1/r2, if r1<R and r2<R
- F1/F2=r22/r21, if r1>R and r2>R
- F1/F2=r1/r2, if r1>R and r2<R
- F1/F2=r21/r22, if r1<R and r2<R

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Solution

Verified by Toppr

Gravitational field inside a sphere of radius R at a distance r is F=GMR3r

And, outside the sphere, it is F=GMr2

Therefore, for r<R

F1F2=r1r2

And for r>R

F1F2=r22r12

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