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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.
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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: ->->->->->->->->->->->-> scussion (start in the next line):
The graph is increasing at an increasing rate
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Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> scussion (start in the next line):
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@& The graph is increasing. From the two data points we don't know whether the rate of increase is changing or how.*@
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What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> scussion (start in the next line):
rise= (40-10) = 30cm/s run= 9-4 = 5sec slope = 30/5= 5cm/s/s
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What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> scussion (start in the next line):
area is equal to the average height * width
(40cm/s + 10cm/s)/2 = 25cm/s* (9sec- 4sec)= 125cm
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*#&!*#&!
&#Your work looks good. See my notes. Let me know if you have any questions. &#