PHY 201
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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The problem:
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?
answer/question/discussion: ->->->->->->->->->->->-> : (9 sec, 28 cm/s)
• What is the velocity at the midpoint of this interval?
answer/question/discussion: ->->->->->->->->->->->-> : 28 cm/s
• How far do you think the object travels during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : 364 cm
this isn't correct
• By how much does the clock time change during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : clock time changes by 8 seconds
• By how much does velocity change during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : the velocity changes by 24 cm/s
• What is the average rate of change of velocity with respect to clock time on this interval?
answer/question/discussion: ->->->->->->->->->->->-> : 3cm/s/s
• What is the rise of the graph between these points?
answer/question/discussion: ->->->->->->->->->->->-> : 16cm/s
this isn't correct
• What is the run of the graph between these points?
answer/question/discussion: ->->->->->->->->->->->-> : 5 seconds
• What is the slope of the graph between these points?
answer/question/discussion: ->->->->->->->->->->->-> : 16/5
this isn't correct; should also include units, as you are doing on most problems
• What does the slope of the graph tell you about the motion of the object during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : The slope is increasing, which means the velocity is increasing.
• What is the average rate of change of the object's velocity with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : 16cm/5s^2
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15 minutes
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Most of your work is correct and well done. I think you'll understand your errors from the discussion at the link. Revision is optional.
&#Please compare your 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. &#