An athlete swims from the north end to the south end of a 50.0m pool in 20.0s and makes the return trip to the starting position in 22.0s.
What is the average velocity?
To find the average velocity, we need to calculate the total displacement and divide it by the total time.
The athlete swims from the north end to the south end of the pool and then returns to the starting position. The total displacement is zero because the athlete ends up at the same position as before. Therefore, the total displacement is 0m.
The total time is the sum of the time taken for one-way trips in both directions: 20.0s + 22.0s = 42.0s.
The average velocity is then calculated as the total displacement divided by the total time:
Average velocity = Total displacement / Total time
Average velocity = 0m / 42.0s
Average velocity = 0 m/s
Therefore, the average velocity is 0 m/s.
To find the average velocity, we need to calculate the total displacement and divide it by the total time taken.
During the first trip from the north end to the south end, the athlete travels a distance of 50.0m.
During the second trip from the south end back to the starting position, the athlete also travels a distance of 50.0m.
Therefore, the total displacement is 50.0m + 50.0m = 100.0m.
The total time taken is 20.0s + 22.0s = 42.0s.
Now, we can calculate the average velocity:
Average velocity = Total displacement / Total time taken
= 100.0m / 42.0s
= 2.38 m/s
Therefore, the average velocity of the athlete is 2.38 m/s.
To calculate the average velocity, we need to divide the total displacement by the total time taken. Velocity is a vector quantity that has both magnitude and direction. In this case, since the athlete goes from the north end to the south end and then back to the starting position, the displacement will be zero. This means that the athlete ends up at the same position he started.
Since the displacement is zero, we can calculate the average velocity using the formula:
Average Velocity = Total Displacement / Total Time
Since the total displacement is zero, the average velocity will also be zero. This means that the average velocity of the athlete is zero.
Alternatively, you can also calculate the average velocity for each leg of the journey separately and then take the average of those velocities. However, since the athlete ends up at the same position, the average velocity for each leg will also be zero, resulting in the same answer of zero for the average velocity.