Question

what is the maximum value gravitational potential and where??​

Answer 1

There is no maximum, as the zero point of potential energy is arbitrary. If one chooses the usual zero point, however, so that the formula

U = -G(m1)(m2) / r

can be used to describe the potential energy in a system of point charges (or radially symmetric spheres) as a function of their separation distance r, then the maximum value is zero, at infinite separation.

Of course, if your system isn't like that, or you choose a different zero point, your answer will be different

Answer 2

Gravitational potential energy changes into kinetic energy. The equation for gravitational potential energy is GPE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 on Earth), and h is the height above the ground in meters.

The gravitational potential increases as we move towards infinity and its maximum value is zero at infinity.

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