C.13

$${\mathrm{\frac{\text{energia}}{\text{vahemaa}}} \bigg |_\text{ideaal} = \frac{P_\text{kogu}}{v} = \frac{1}{2} c_d \rho A_p v^2 + \frac{1}{2} \frac{(mg)^2}{\rho v^2 A_s}}$$