Question

Write an expression for the gravitational potential at the surface of the earth. ​

Answer 1

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Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2.

Near the surface of the Earth, the work done in lifting an object through a height h h is the product mgh mgh , so U=mgh U = mgh .

Answer 2

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The value of gravitational potential is given by, V = -GM/R. Case 2: If point 'P' lies on the surface of the spherical shell (r=R): On the surface of the earth, E = -GM/R2.