PHY 121
Your 'cq_1_04.1' 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 is moving at 10 cm/s when clock time is 4 seconds, and at 40 cm/s when clock time is 9 seconds.
• Sketch a v vs. t graph and represent these two events by the points (4 sec, 10 cm/s) and (9 s, 40 cm/s).
answer/question/discussion: ->->->->->->->->->->->-> :
• Sketch a straight line segment between these points.
answer/question/discussion: ->->->->->->->->->->->-> :
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> :
Rise: 40 cm/s – 10 cm/s = 30 cm/s
Run: 9 sec – 4 sec = 5 sec
Slope: 30 cm/s / 5 sec = 6 cm/s/s
• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> :
The area of the graph beneath the segment represent the change in velocity between two clock times.
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20 minutes
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Very good on the slope, but see the link below regarding the question of area:
&#Please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified. &#