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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.
** CQ_1_04.1_labelMessages **
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).
• Sketch a straight line segment between these points.
• What are the rise, run and slope of this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line): The rise=change in velocity= 40 cm/s-10 cm/s= 30 cm/s
The run= change in clock time= 9 sec-4 sec= 5 sec
Slope= rise/run
Slope= 30 cm/s / 5 sec
=6 cm/s^2
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• What is the area of the graph beneath this segment?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line): The Area of the graph= 1/2 altitude * width
altitude= (10 cm/s +40 cm/s)
1/2 Altitude= 25 cm/s
width= 9 sec- 4 sec= 5 sec
25cm/s* 5 sec= 125 cm
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20 minutes
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&#Very good responses. Let me know if you have questions. &#