Answer:
Gravitational field at the mid-point of the line joining
the centres of the two spheres
Gravitational
potential at the mid point of the line joining the centres of the two spheres
is
As
the effective force on the body placed at mid-point is zero, so the body is in
equilibrium. If the body is displaced a little towards either mass body from
its equilibrium position, it will not return back to its initial position of
equilibrium. Hence, the body is in
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