Phy 201
Your 'cq_1_02.1' 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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A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
• What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
If a ball starts at 4cm/sec and ends with 10 cm/sec, to get the average acceleration you have to then take 10cm/sec-4 cm/sec and then divide by the change in time. But in this case there is no time change given so you have to guess an average of 6 cm/sec.
you don't average two numbers by subtracting them; check the link at the end
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• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
This is just a rough estimate because there is missing information, such as the time in change.
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• If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
You would take the time of 3 seconds and times it by the average of acceleration being 6 cm/sec, so the answer would be the ball traveled 18 cm.
right reasoning, but ave velocity needs to be corrected
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• At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The ball started at 4cm/sec and ended at 10cm/sec and had a time change of 3 seconds. So you minus beginning acceleration from end acceleration and then divide by 3 sec. Thus giving you the answer of an average acceleration of 2 cm/sec
Your units aren't completely correct here. Be sure to check the discussion in the link given at the end of this document.
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20 mins
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&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then 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.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#