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Phy 121
Your 'cq_1_09.1' 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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A ball accelerates uniformly as it rolls 20 cm down a ramp, starting from rest, in 2 seconds.
• What are its average velocity, final velocity and acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
vAve= a * dt
a = vAve /dt
a = 10 cm/s / 2 s
a = 5 cm/s^2
Vf = 10 cm/s
after two seconds it'd be traveling at 10 cm/s
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• If the time interval is in error so that it is 3% longer than the actual time interval, then what are the actual values of the final velocity and acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
2.06 seconds
vAve= a *dt
a = vAve/ dt
a= 10 cm/s / 2.06 s
a= 4.854 cm/s^2
vf= 9.71 cm/s
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• What is the percent error in each?
answer/question/discussion: ->->->->->->->->->->->-> :
2.03 %
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• If the percent error is the same for both velocity and acceleration, explain why this must be so.
answer/question/discussion: ->->->->->->->->->->->-> :
They are both the same because they both use the same numbers.
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• If the percent errors are different explain why it must be so.
answer/question/discussion: ->->->->->->->->->->->-> :
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30 minutes
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Good, but you did miss a couple of things.
&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then 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.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#