An elevator and its load have a total mass of $800 \mathrm{kg}$. The elevator is originally moving downwards at $10\mathrm{ }\mathrm{m} {\mathrm{s}}^{-1}$, it slows down to stop with constant acceleration in a distance of $25 \mathrm{m}$. Find the tension $T$ in the supporting cable while the elevator is being brought to rest. (Take $g=10\mathrm{ }\mathrm{m} {\mathrm{s}}^{-2}$)