Question

An athlete swims from the northend to the south end of a 50meter pool in 20second and makes the return trip to the starting position in 25 second .what is the athletes average speed and avrage velocity for the round trip respectively?

Answer 1

Total distance = 50 m + 50 m = 100 m.
Total time = 20 s + 25 s = 45 s.

Average speed = total distance / total time = 100 m / 45 s = 20/9 m/s ≈ 2.22 m/s.

Average velocity = total displacement / total time = 0 m / 45 s = 0 m/s.