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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 a graph into my notebook that has the clock time on the x axis and the position on the y axis. The points are plotted at (4,10) and (9,40).
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• Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I connected the points (4,10) to (9,40) with a straight line segment by using a straight edge.
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• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The rise is 30 (40-10). The run is 5 (9-4). Therefore, the slope is 6 (30/5).
@& Good, but all these quantities, and the result, have units that need to be included.*@
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• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The area of the graph is 75m.
By connecting the points by a line segment, we create a diagonal line. This forms a triangle with the base being 4 seconds and the height being 30m/s. Then, we plug these values into the triangle area formula : 1/2*b*h= (1/2)*(4s)*(30m/s)= 75
@& The entire area under of the trapezoid corresponds to the displacement. Be sure you understand why.
That final result has units, which follow when you multiply m/s by s.*@
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40 minutes
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&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new 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. &#
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