For a uniform solid sphere of mass M and radius R, consider a point at distance r

Question

For a uniform solid sphere of mass M and radius R, consider a point at distance r<R from its centre. Which statements are correct?

G1 Physics · Accepted Answer

Only mass enclosed within r contributes to field, giving g=GMr/R³. Integration with V(R)=−GM/R gives V=−GM(3R²−r²)/(2R³). Potential is most negative at r=0, while field is zero there and increases linearly to the surface.