To find the average speed of the athlete, we can use the formula:
average speed = total distance / total time
In this case, the total distance is twice the length of the pool because the athlete swims to the south end and back to the north end. So the total distance is 2 * 5.0 m = 10.0 m.
The total time is the sum of the time taken to swim from north to south and the time taken to swim from south to north. So the total time is 20.0 s + 22.0 s = 42.0 s.
Now we can substitute these values into the formula to find the average speed:
average speed = 10.0 m / 42.0 s
Using a calculator, we find:
average speed ≈ 0.238 m/s
Therefore, the athlete's average speed is approximately 0.238 m/s.
An athlete swims from the north end to the south end of a 5.0 m pool in 20.0 s and makes the return trip to the starting position in 22.0 s.
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