question_answer

Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be: [AIPMT 2003]

A) \[\frac{F}{3}\]

B) \[\frac{F}{9}\]  

C) \[3\,F\]

D) F

Correct Answer: D

Solution :

According to Newton's law of gravitation, the force between two spheres is given by

From the relation, we can say the gravitational force does not depend on the medium between two spheres hence, it remains same i.e., F.