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

The height $(h)$ transversed by particle while going up is $n=\frac{u^2}{2g}=\frac{25}{2\times 9.8}$ Work done by gravity force $=m\mathrm{g}\cdot \mathrm{h}$ $=0.1\times g\times \frac{25}{2\times 9.8}\cos 180^{\circ }$ (angle between force and displacement is $180^{\circ })$ $\therefore W=-0.1\times \frac{25}{2}=-1.25$