The gravitational potential energy of a body of mass ‘m’ at the earth’s surface -mgRe. Its gravitational potential energy at a height Re from the earth’s surface will be (Here Re  is the radius of the earth)

(a)       -2mgRe              (b)        2mgRe

(c)       12mgRe               (d)        -12mgRe

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Concept Questions :-

Gravitational potential energy

(d) U=U2-U1=mgh1+hRe=mgRe1+ReRe=mgRe2

        U2+mgRe=mgRe2U2=-12mgRe

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