A body of mass m is kept at a small heig...

A body of mass `m` is kept at a small height `h` above the ground. If the radius of the earth is R and its mass is M, the potential energy of the body and earth system (with `h=infty` being the reference position) is

`(GMm)/(R)+mgh`

`(-GMm)/(R)+mgh`

`(GMm)/(R)-mgh`

`(-GMm)/(R)-mgh`

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