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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.
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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):
The velocity would be on the y axis and the clock time would be on the x axis. It would be a straight line from the first point to the second point.
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Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I sketched the line between the points.
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What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The rise would be change in velocity which is 40cm/s - 10cm/s = 30cm/s. The run would be change in time which is 9sec - 4 sec - 5 sec. The slope would be 30cm/s over 5
secs. = 6cm/s.
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@& (cm/s) / s is not cm/s. Otherwise good. *@
What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The area is average velocity * time interval so it would be 25cm/s * 5s = 125 cm. So the area would be 125 meters.
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*#&!
&#Good responses. See my notes and let me know if you have questions. &#