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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.
** CQ_1_02.1_labelMessages.txt **
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/s+10 cm/s=14 cm/s / 2= 7cm/s
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Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line): We don’t know how much the ball sped up and slowed down between the beginning and end.
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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): `ds=vAve*`dt
`ds=7 cm/s*3s
`ds=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):
average rate=(change in velocity)/(change in clock time)
change in velocity=10 cm/s-4 cm/s=6 cm/s
change in clock time=3 s
average rate=(6 cm/s)/3 s
average rate=2 cm/sec^2
** **
20 min
&#Very good responses. Let me know if you have questions. &#