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Phy 231
Your 'cq_1_03.1' 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 starts with velocity 0 and accelerates uniformly down a ramp of length 30 cm, covering
the distance in 5 seconds.
What is its average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
30/5=6
6/2=3cm/s
@& Average velocity is the average rate of change of position with respect to clock time. So your first calculation yields the average velocity.*@
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If the acceleration of the ball is uniform then its average velocity is equal to the average of
its initial and final velocities.
You know its average velocity, and you know the initial velocity is zero.
What therefore must be the final velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
6cm/s
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By how much did its velocity therefore change?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
6cm/s
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At what average rate did its velocity change with respect to clock time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
(6cm/s)/5s
(6/5)cm/s^2
@& 6 cm/s is the average velocity, not the change in the velocity.
*@
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What would a graph of its velocity vs. clock time look like? Give the best description you
can.
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The graph would be linear and increasing. It would start at (0,0) and end at (5,6)
@& 6 cm/s is the average velocity, not the final velocity.
*@
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5min
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&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new 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.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#