Physics

Problem

5\,\text{kg}

object is placed (i)

10\,000\,\text{km}

and (ii)

20\,000\,\text{km}

from the centre of Earth. Taking Earth’s mass as

6.0\times10^{24}\,\text{kg}

, find the ratio

U_{(i)}/U_{(ii)}

of the gravitational potential energies of the object at the two positions.