Phy 121
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.
** **
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 drew the graph in my notebook and will describe it for this seed question. The line has two points, as stated, (4,10) and (9,40). The rise is 30, the run is 5, making the slope 6. The slope also has a direct correlation to the average velocity. The line slopes from lower right to upper left with an x intercept between 2 and 3 and a y intercept between -9 and -10, guesstimated from eyeballing the graph.
these quantities all have units, which must be included at every step in order to keep track of what they mean
#$&*
• Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The straight line segment has a slope of 6 and is represented by the equation y=6x-14
#$&*
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The rise is 30, the run is 5, making the slope 6
#$&*
• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
area under the graph that of ˝ triangle formed by the points and the right angle point (9,10). The area of the triangle was added to rectangle to connect it to the x axis and the area was found to be 125. I’m not sure of the units, since I have both cm and seconds….
** **
20 minutes
** **
Check the following link and be very sure you understand the units and what they tell you.
&#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. &#
&#No revision is necessary unless you have a question, or something you want me to review. &#