PHY 201
Your 'cq_1_04.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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The problem:
A ball is moving at 10 cm/s when clock time is 4 seconds, and at 40 cm/s when clock time is 9 seconds.
• Sketch a v vs. t graph and represent these two events by the points (4 sec, 10 cm/s) and (9 s, 40 cm/s).
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I sketched the graph was velocity on the y axis and the time on the x axis. The two points have a wide space between them. I put the time in patterns of 2 and I put the velocity in patterns of 5.
#$&*
• Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The line will have a y-intercept but it is too steep to determine it on this graph. It looks like the line will pass through the x axis somewhere between 3 and 4, but this is line segment and a line segment does not go passed the points specified.
#$&*
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The rise of the line is: 10-40 = -30, and the run is: 4-9 = -5. The slope of this segment is: -30/-5 = 6.
#$&*
• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The area beneath the graph of this segment is the change in positions between the two points.
Slope has units, but your numbers and your reasoning on slope are good.
You haven't calculated the area correctly.
&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#