#$&*
phy121
Your 'cq_1_02.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_02.1_labelMessages.txt **
The problem:
A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
• What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
my best guess for the balls average velocity would be 3cm/s.
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• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
It is just a guess because we do not know how far it travelled in respect to the time travelled during that period. Instead we are just given the change of velocity without the distance or the time.
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• If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
my best guess would be taking the average velocity I guessed in question 1 (3cm/s) and multiply it by 3s.
3cm/s*3s= 9cm
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• At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The velocity changed with respect to clock time during the interval at an average rate of 3cm/s.
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** **
15 minutes
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I submitted it previously but forgot to fill out the information at the top of the form, sorry.
self-critique #$&*
#$&* self-critique
self-critique rating
`gr91 rating #$&*:
`c021
#$&*
phy121
Your 'cq_1_02.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_02.1_labelMessages.txt **
The problem:
A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
• What is your best guess about the ball's average velocity?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
my best guess for the balls average velocity would be 3cm/s.
#$&*
@&
Its velocity is never less than 4 cm/s. An average velocity of 3 cm/s wouldn't be consistent with this observation.
*@
• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
It is just a guess because we do not know how far it travelled in respect to the time travelled during that period. Instead we are just given the change of velocity without the distance or the time.
#$&*
• If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
my best guess would be taking the average velocity I guessed in question 1 (3cm/s) and multiply it by 3s.
3cm/s*3s= 9cm
#$&*
• 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 velocity changed with respect to clock time during the interval at an average rate of 3cm/s.
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@&
You need to carefully apply the definition of rate of change to this situation.
Start with the definition, identify the relevant quantities and see what you get.
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*#&!*#&!
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Check my notes. For the last question especially you need to be very careful to apply the correct definition.
&#Please see my notes and submit a copy of this document with revisions, comments and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes. &#
*@