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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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):
(4 cm/sec + 10 cm/sec) / 2 = 7 cm/sec
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• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
Because we do not know the time or distance that it traveled.
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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):
From the answer in question 1 of 7 cm/s the distance will be
7 cm/s * 3 s = 21 cm
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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):
a = (10 - 4) / 3 = 2 cm/s^2
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30 min
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&#Very good responses. Let me know if you have questions. &#
&#Please compare your solutions with the expanded discussion at the link
Solution
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