physics
posted by Anonymous .
A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the horizontal. What is the vertical velocity of this motion?Select one of the options below as your answer: A. 18.3 meters/second B. 43.3 meters/second C. 25.0 meters/second D. 28.9 meters/second E. 32.1 meters/second

v =s/t =500/10 =50 m/s.
v(y) = v•sinα = 50•sin30º = 25 m/s
C. 25.0 meters/second