posted by Alex .
An athlete springs a circular 400.0 m track in 50.0 s. Asume he runs a constant speed.
a. What is his speed over the entire course?
b. What is the magnitude of his instantaneous velocity at any point along the circuit?
c. If he starts facing west and runs counterclockwise, what is his velocity halfway around the circle?
d. What is the average acceleration for one lap of the track?