Gravitation Question 340

Question: Inside a uniform sphere of density p there is a spherical cavity whose centre is at a distance [] from the centre of the sphere. Find the strength F of the gravitational field inside the cavity at the point P.

Options:

A) [43Gπρ]

B) [13Gπρ]

C) [23Gπρ]

D) [12Gπρ]

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Answer:

Correct Answer: A

Solution:

  • For calculation of gravitational field intensity inside the cavity. [I1=G(43πR13)ρ(r1)R13]

    [I2=G(43πR23)ρ(r2)R23]

    [I=I1I2] ([I] intensity inside the cavity)



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