A runner increases speed on a straight track from 3.0 meters per second to 7.0 meters per second in 2.0 seconds.
What is the magnitude of the runner's average acceleration during the time period?
Answer options with 4 options
A.
2 meters per second squared
B.
4 meters per second squared
C.
5 meters per second squared
D.
8 meters per second squared
To find the average acceleration, we can use the formula:
average acceleration = change in velocity / time
The change in velocity is given as 7.0 m/s - 3.0 m/s = 4.0 m/s.
The time is given as 2.0 seconds.
Therefore, the average acceleration is:
average acceleration = 4.0 m/s / 2.0 s = 2.0 m/s^2
So, the correct answer is A. 2 meters per second squared.