phy121
Your 'cq_1_02.2' 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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A graph is constructed representing velocity vs. clock time for the interval between clock times t = 5 seconds and t = 13 seconds. The graph consists of a straight line from the point (5 sec, 16 cm/s) to the point (13 sec, 40 cm/s).
What is the clock time at the midpoint of this interval?
9sec
What is the velocity at the midpoint of this interval?
~28cm/sec
How far do you think the object travels during this interval?
~88cm
By how much does the clock time change during this interval?
4 sec
By how much does velocity change during this interval?
12cm/sec
What is the average rate of change of velocity with respect to clock time on this interval?
(3cm/sec)/sec
What is the rise of the graph between these points?
8
What is the run of the graph between these points?
24
What is the slope of the graph between these points?
.333
What does the slope of the graph tell you about the motion of the object during this interval?
the object is accelerating
What is the average rate of change of the object's velocity with respect to clock time during this interval?
(3cm/sec)/sec
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5min
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You have a lot of correct answers, but some are incorrect. You haven't indicated how you reason that these answers or what quantities went into finding them. You need to insert this information, and in the process be watch for possibly careless errors. Also be sure to use units with every quantity that has units. You clearly know what you are doing, so this shouldn't take you long.
&#Please see my notes and submit a copy of this document with revisions and/or questions, and mark your insertions with &&&&. &#
This is fine. I haven't yet put a score on your test, but it is clear that you have made an A on the test.