A runner completes a 400 m lap in 50 seconds. What is the runner's average veloc

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Question: A runner completes a 400 m lap in 50 seconds. What is the runner\'s average velocity?

Options:

Correct Answer: 8 m/s

Solution:

Average velocity = total displacement / total time. Since the runner returns to the starting point, displacement = 0. Average velocity = 0 m/s.

A runner completes a 400 m lap in 50 seconds. What is the runner's average velocity?

A runner completes a 400 m lap in 50 seconds. What is the runner's average velocity?

Step 1: Understand that average velocity is calculated using the formula: average velocity = total displacement / total time.
Step 2: Identify the total displacement. Displacement is the straight-line distance from the starting point to the ending point. Since the runner completes a lap and returns to the starting point, the displacement is 0 meters.
Step 3: Identify the total time taken. The runner takes 50 seconds to complete the lap.
Step 4: Plug the values into the formula: average velocity = 0 meters / 50 seconds.
Step 5: Calculate the average velocity. Since the displacement is 0, the average velocity is 0 m/s.

Average Velocity – Average velocity is defined as the total displacement divided by the total time taken. Displacement considers the shortest distance from the initial to the final position.
Displacement vs Distance – Displacement is a vector quantity that refers to the change in position, while distance is a scalar quantity that refers to the total path length traveled.