Solved: (Ill) Two drag forces act on a bicycle and rider:
Chapter , Problem 70(choose chapter or problem)
(Ill) Two drag forces act on a bicycle and rider: FD i due torolling resistance, which is essentially velocity independent;and Fd2 due to air resistance, which is proportional to v2.For a specific bike plus rider of total mass 78 kg,Fd1 4.0 N; and for a speed of 2.2 m/s, FD2 ~ 1.0 N.(a) Show that the total drag force is Fd = 4.0 + 0.21v2,where v is in m/s, and FD is in N and opposes the motion.(b) Determine at what slope angle 0 the bike and rider cancoast downhill at a constant speed of 8.0 m/s.
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