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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.
** CQ_1_04.1_labelMessages **
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).
• Sketch a straight line segment between these points.
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
-The rise of this graph is 30 because 40-10=30.
-The run of this graph is 5 because 9-4=5.
-The slope of this graph is 6 because 30/5=6.
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These quantitites have units, which give them meaning. You need to include units.
Otherwise very good.
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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 right triangle that the segment forms is 75 because A=(1/2)lw=(1/2)*3*50=75.
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The region beneath the segment is not a triangle, it is a trapezoid.
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