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Phy 231
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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The problem:
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):
(10cm/sec + 4cm/sec) / 2 = 14cm/sec / 2 = 7cm/sec
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• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
One cannot determine if the ball stays closer to one velocity or the other over the given time interval.
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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):
7cm/sec * 3sec = 21cm
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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):
(10cm/sec - 4cm/sec) / (3sec) = 6cm/sec / 3sec = 2cm/sec^2
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7 minutes
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5/15 3AM
&#Very good work. Let me know if you have questions. &#