A = Δ W + E = \frac{3 m g H}{4} + \frac{m}{2} {(\frac{S H}{2 π R^{2} t})}^{2}

${A = \Delta W + E = \frac{3mgH}{4} + \frac{m}{2}\left(\frac{SH}{2\pi R^2t}\right)^2}$

Error