Gravitational Potential Energy

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1. 1 2019 #
   The work done to raise a mass $m$ from the surface of the earth to a height $h$, which is equal to the radius of the earth, is:
   A $mgR$

   B $2\,mgR$

   C $\frac{1}{2}mgR$

   D $\frac{3}{2}mgR$
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