The frontal cross - sectional area , the velocity of the swimmer , the wetted surface area of the swimmer , the density of the fluid , and the coefficient of drag will all be the same whether the body is on the front or side 身體前部分的橫截面面積,運(yùn)動(dòng)員的速度,運(yùn)動(dòng)員的觸水面積,液體的密度以及拖曳系數(shù)都是一樣的而無論身體是朝向一邊或前傾。
英文解釋
the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body 同義詞:drag coefficient,