Physics - W.E.P. Question with Solution | TestHub

A body of mass $1\mathrm{kg}$ of thrown upwards with a velocity $20\mathrm{m}/\mathrm{s}$. It momenetarily comes to rest after attaining a height of $18\mathrm{m}$. How much energy is lost due to air friction ? $$\left(\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^2\right)$$NEET 2009 (Mains)