Two large spherical objects of mass M each (uniformly distributed) are fixed as shown in figure. A small point mass m is projected from point A heading towards center C 2 of second sphere. The minimum velocity of point mass so that it can reach upto second object at point B is 
calculate n. [Neglect other gravitational forces]
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If the ball can reach the midpoint of line connecting spheres, then it will get attracted towards B. (At midpoint gravitational intensity is zero) Using energy conservation,
Solving, 
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