Drag force的計算公式為：Fdrag = constant × area × (velocity)^2。其中，constant = kg/m^3，area = cross section seen by the wind (in m^2)，velocity is in m/s。
Drag force的計算公式為：Fdrag = constant × area × (velocity)^2。其中，constant = kg/m^3，area = cross section seen by the wind (in m^2)，velocity is in m/s。