Mass density of a solid sphere is p. Radius of the sphere is R. The gravitational field at a
distance r(< R) from the centre of the sphere inside it is
4pGer
(A)
3
(B)
4pGr2
3
(C)
4pGR
3r2
PGR
(D)
Answers
Answered by
0
Answer:
Let us calculate the mass of the sphere.
dm=ρ(4πr
2
dr)=4πρ
0
ardr
m=∫
0
a
dm=∫
0
a
4πρ
0
ardr=2πρ
0
a
3
Thus, gravitational field at a distance of 2a from the center is
g=
(2a)
2
Gm
=
2
πGρ
0
a
Answer is
2
πGρ
0
a
Explanation:
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