A runner completes a 400 m lap in 50 seconds. What is the runner's average velocity?
Practice Questions
1 question
Q1
A runner completes a 400 m lap in 50 seconds. What is the runner's average velocity?
8 m/s
6 m/s
4 m/s
2 m/s
Average velocity = total displacement / total time. Since the runner returns to the starting point, displacement = 0. Average velocity = 0 m/s.
Questions & Step-by-step Solutions
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Q
Q: A runner completes a 400 m lap in 50 seconds. What is the runner's average velocity?
Solution: Average velocity = total displacement / total time. Since the runner returns to the starting point, displacement = 0. Average velocity = 0 m/s.
Steps: 5
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.
