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: the graph had a positive straight line with a positive slope
• Sketch a straight line segment between these points.
answer/question/discussion: the straight line was positive
• What are the rise, run and slope of this segment?
answer/question/discussion: rise=5 seconds, run=30m/s, slope=6m/s
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15 minutes
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Good, but your rise and run are reversed, and the units of your slope aren't correct. If you use the rise and run you specify, the slope is rise / run = (5 sec) / (30 m/s) = .166... s^2 / m. The correct slope is rise / run = (30 m/s) / (5 s) = 6 m/s^2.
&#At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
This link also expands on these topics and alerts you to many of the common errors made by students in the first part of this course. &#