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Physics Question on Surface tension

uniform sphere of radius R and mass M
Consider a uniform sphere of radius R and mass M. A spherical cavity of radius R/2 is made in the sphere as shown in figure. The magnitude of the gravitational intensity at a point O on the surface of the cavity is

A

GMR2\frac{GM}{R^2}

B

0

C

GM8R2\frac{GM}{8R^2}

D

GM2R2\frac{GM}{2R^2}

Answer

GM2R2\frac{GM}{2R^2}

Explanation

Solution

The correct option is (D): GM2R2\frac{GM}{2R^2}