A simple diagram of the "drace force" and", where one swimmer is shown in profile, with an arrow pointing down to show that their drag forces on water surface are larger than those for another person swimming upright or side_Minimalist style, white background." Text below includes words such as "-dimensional view showing ' trip' drage force" and "Water surface". The arrows point directly at each other between two swimmers, indicating equal SurGBLall speed..an animated version of thw swimers using animation techniques to highlight movement lines. , cartoon-style, simple design, white background, vector illustration, no text. --ar 7:6