Final answer:
The boy's average velocity can be calculated by dividing the distance he walked, which is 500 meters, by the time it took, which is 10 seconds. Hence, his average velocity is 50 m/s, and the correct answer is A) 50 m/s.
Step-by-step explanation:
The student is asking about how to calculate average velocity, which is a basic concept in physics. Average velocity is defined as the displacement (change in position) divided by the time in which the change occurs. For the boy walking, we can calculate it by taking the distance he walked and dividing it by the time it took him.
To find the boy's average velocity, we use the formula:
Average Velocity = Total Displacement / Total Time
In this case, the boy's total displacement is 500 meters and the total time is 10 seconds. Thus, the average velocity is:
500 meters / 10 seconds = 50 m/s
Therefore, the correct answer is A) 50 m/s.