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An athlete starts at point A and runs at a constant speed of around a circular track 100 m in diameter
, as
shown in Fig. P3.40. Find the x and y-components of this runner’s average velocity and average acceleration between points
(a) A and B, (b) A and C, (c) C
and D, and (d) A and A (a full
lap). (e) Calculate the magnitude
of the runner’s average velocity
between A and B. Is his average speed equal to the magnitude of
his average velocity? Why or why not? (f) How can his velocity be
changing if he is running at constant speed?