Phy 231
Your 'cq_1_02.2' 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 graph is constructed representing velocity vs. clock time for the interval between clock times t = 5 seconds and t = 13 seconds. The graph consists of a straight line from the point (5 sec, 16 cm/s) to the point (13 sec, 40 cm/s).
What is the clock time at the midpoint of this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
t = 9 s
What is the velocity at the midpoint of this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
(40 cm/s + 13 cm/s)/2 = 26.5 cm/s
there is no velocity equal to 13 cm/s
How far do you think the object travels during this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
26.5 cm/s * (13 - 5 s) = 212 cm
By how much does the clock time change during this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
13 - 5 = 8 sec elapsed
By how much does velocity change during this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
40 cm/s - 13 cm/s = 27 cm/s
What is the average rate of change of velocity with respect to clock time on this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
40 cm/s - 13 cm/s = 27 cm/s / 8 s = 3.4 cm/s/s
What is the rise of the graph between these points?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
27 cm/s
What is the run of the graph between these points?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
8 s
What is the slope of the graph between these points?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
27 / 8 = 3.4
What does the slope of the graph tell you about the motion of the object during this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
That this object has acceleration of 3.4 cm/s/s
What is the average rate of change of the object's velocity with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> scussion:
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20 minutes
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You got mixed up on one of your velocities, but all your reasoning is fine and had that first velocity been 13 m/s your results would have been correct.