The pet store would be the reference point because it is where he started and it will not move. Hope this helped.
Answer:
10.0 zero, by Gauss' Law the symmetrical distribution will produce no internal electric fields
21.5 E = k Q / R^2 behaves as if all charge were at center
E = 9 E9 * 29.5 E-6 / .215^2 = 5.74E6 N/C
90t - .100 = 75t
90t - 75t = 0.100
15t = 0.100
t = 0.0067
<u>t = 0.0067 hours or 24.12 seconds</u> (.0067 * 60 minutes * 60 seconds)
The story that fits the graph is; he elevator moves up, is stationary for a while, then moves down at a slower rate.
<h3>What is a position time graph?</h3>
The term position time graph shows us how the position of the object is changing with time. The position in this case has to do with the exact point in space where the object can be found. We have here an elevator that could be found at various points.
We now have to turn to the graph and see how the graph can be able to give a description of the motion of the elevator. If we look at the position time graph, it tends to move up and then remain at a point for some time before it moves down.
Based on the analysis that we have made above, we can now look out for any of the stories that fits the description that we have just made here.
Learn more about position time graph:brainly.com/question/13693087
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