Phy 231
Your 'cq_1_6.1' 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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For each situation state which of the five quantities v0, vf, `ds, `dt and a are given, and give the value of each.
A ball accelerates uniformly from 10 cm/s to 20 cm/s while traveling 45 cm.
answer/question/discussion: Given quantities are v0, vf, and 'ds. V0 = 10 cm/s, vf = 20 cm/s, and 'ds = 45 cm
A ball accelerates uniformly at 10 cm/s^2 for 3 seconds, and at the end of this interval is moving at 50 cm/s.
answer/question/discussion: Given quantities are a, 'dt, and vf. a = 10 cm/s/s, 'dt = 3 s, and vf = 50 cm/s.
A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
answer/question/discussion: Given quantities are 'ds, v0, and a. 'ds = 30 cm, v0 = 0 cm/s, and a = 20 cm/s/s
Then for each situation answer the following:
Is it possible from this information to directly determine vAve?
answer/question/discussion: If the question only relates to the last set of quantities ('ds, v0, and a), then yes we can determine aAve, but only after determining vf. We can find vf by using the formula: vf^2 = v0^2 + 2a * 'ds. Once we know vf, we can easily calculate vAve.
Is it possible to directly determine `dv?
answer/question/discussion: Again, yes, using the same equation just mentioned we can find vf. Once we know vf, we can easily find 'dv.
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15 mins
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The last two questions ask whether vAve and `dv can be determined directly. Your answers are insightful, but see the link below to clarify exactly what these questions are getting at. You will understand; ignore the request for a revision.
&#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. &#