A stationary object at $4 °\mathrm{C}$ and weighing $3.5\mathrm{ }\mathrm{k}\mathrm{g}$ falls from a height of $2000 \mathrm{m}$ on a snow mountain at $0{ }^{\mathrm{o}}\mathrm{C}$. If the temperature of the object just before hitting the snow is $0{ }^{\mathrm{o}}\mathrm{C}$ and the object comes to rest immediately, then the object will melt (Use, $g=10\mathrm{ }\mathrm{m} {\mathrm{s}}^{-2}$ and latent heat of ice$=3.5\times 10^5 \mathrm{J} {\mathrm{kg}}^{-1}$)