A toy train is on a track which has a circumference of 10 meters. The train takes 20 seconds to complete one revolution around the
track.what is it's average speed? average velocity?
r = d/t = 10 m / 20 s = 0.5 m/s.
V = 1 rev / 20 s = .05 rev/s = 0.314 rad/s.