1.

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

A. \[\frac{4}{3}G\pi \rho \vec{\ell }\]
B. \[\frac{1}{3}G\pi \rho \vec{\ell }\]
C. \[\frac{2}{3}G\pi \rho \vec{\ell }\]
D. \[\frac{1}{2}G\pi \rho \vec{\ell }\]
Answer» B. \[\frac{1}{3}G\pi \rho \vec{\ell }\]


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