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`        The magnitudes of the gravitational field at distance r1 and r2 from the centre of a uniform sphere of radius R and mass m r F­1 and F2 respectively. Then : (a) F1/F2 = r1/r2 if r1 < R and r2 < R(b) F1/F2 = r22/r21 if r1 > R and r2 > R(b) F1/F2 = r22 / r21 if r1 > R and r2 > R(c) F1/F2 – r1 /r2 if r1 > R and r2 > R(d) F2/F2 = r21 / r22 if r1 < R and r2 < R`
5 years ago

```

(a,b,)
For r > R, the gravitational field is F = GM / r2

? F1 = GM/r21 and F2
GM / r22 ? F1/F2 = r22 / r21

For
r < R, the gravitational field F = GM/R3 x r

? F1 = GM/R3 x r1 and F2
= GM/R3 x r2

? F1/F2 = r1 / r2

```
5 years ago
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