Physics

Problem

Two identical solid spheres each of mass

5\,\text{kg}

are initially

0.20\,\text{m}

apart (centre to centre). Determine the work that must be done to increase the separation to

0.40\,\text{m}

. Use

G = 6.67\times10^{-11}\,\text{N\,m}^2\text{/kg}^2