Based on the calculations, the elapsed time and average speed for Trial B are equal to 3.0 seconds and 1.3 m/s respectively.
What is an elapsed time?
An elapsed time can be defined as the difference between the final time and initial time that is required to complete a task.
For Trial B, the elapsed time is given by:
Elapsed time = Time (final) - Time (initial)
Elapsed time = 4.5 - 1.5
Elapsed time = 3.0 seconds.
How to calculate average speed.
Mathematically, average speed is calculated by using this formula:
[tex]Average \;speed=\frac{Total\;distance}{Total\;time}[/tex]
Average speed = 4/3
Average speed = 1.3 m/s.
Read more on average speed here: https://brainly.com/question/6504879
