9000072908

A $100\mathrm{kg}$ heavy anchor is attached to a $20\mathrm{m}$ long rope. One meter of the rope weights $1\mathrm{kg}$. Find the work required to raise the anchor $20\mathrm{m}$ higher. The standard acceleration of gravity is $9.81{\mathrm{m}\mathrm{s}}^{-2}$. Neglect the buoyancy (the force from the Archimedes law).