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A solid sphere of mass M  and radius R  has a spherical gravity of radius  such that the centre of cavity is at distance R/ 2 from the centre of the sphere. A point mass  is placed inside the cavity at a distance R/4 from the centre of sphere. The gravitational pull between the sphere and the point mass  is

a)

b)

c)

d)



Question ID - 54972 | SaraNextGen Top Answer

A solid sphere of mass M  and radius R  has a spherical gravity of radius  such that the centre of cavity is at distance R/ 2 from the centre of the sphere. A point mass  is placed inside the cavity at a distance R/4 from the centre of sphere. The gravitational pull between the sphere and the point mass  is

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

To calculate the force of attraction on the point mass  we should calculate the force due to the solid sphere and subtract from this the force which the mass of the hollow sphere would have exerted on

127 votes


127