Question

A woman rides a bicycle down a hill with a 15% slope (rise/run). The combined mass of the bicycle plus woman is 50 kg. She is riding into a 20-km-per hour wind. The only forces acting on the woman are drag force and weight. If the woman and bicycle together have a projected area of 1.0 m2, and the coefficient of drag is 1.1, how fast is the bicycle going relative to the ground? The density of air is 1.23 kg/m3.

Answer 1

(5) Drag fasce v wsino To=150 VW force =0. Wang At terminal velocity mgsino = 5 ing sino = 1 / 0 V²A Cd v 2 mg sino Cd PA 2 x 50x9.81 x sin 15° l'1 X 1x1.23 kylms = 13.698 m/s >