course Phy 201
It's a good idea for you to include a title so you can identify your work on your access page. I inserted a title for you, but I won't always notice when the title is missing, my title might not be what you will be looking for, and in any case I won't always be able to take the time to do this.
Version 1
An automobile traveling a straight line is at point A at clock time t = 4 sec, where it is traveling at 10 m/s, to point B at clock time t = 11 sec, where it is traveling at 20.5 m/s. Point A is 75 meters from the starting point and point B is 115 meters from the starting point. What are the average velocity and the average acceleration of the automobile during the specified time? What evidence is there that the acceleration is or is not uniform?
vAve = 'ds/'dt vAve = 12.5/7 = 1.786 m/s
aAve = 'dv/'dt aAve = .28576 m/s/s
The evidence that the acceleration is uniform is not uniform is that the object is not increasing at a constant rate."
vAve and aAve are correct.
Average velocity is defined as average rate of change of position, vAve = `ds / `dt.Average velocity is equal to the average of initial and final velocities, (vf + v0) / 2, if acceleration is uniform. If average velocity is not equal to the average of initial and final velocities, then acceleration is not uniform. This information can be used to determine whether or not acceleration is uniform. What is your conclusion?