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Phy 201
Your 'cq_1_08.1' 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 is tossed upward with an initial velocity of 25 meters / second. Assume that the acceleration of gravity is 10 m/s^2 downward.
What will be the velocity of the ball after one second?
answer/question/discussion: ->->->->->->->->->->->-> :
15 m/s
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What will be its velocity at the end of two seconds?
answer/question/discussion: ->->->->->->->->->->->-> :
40 m/s
@& Your answer to the preceding question was 15 m/s, which is correct.
Your answer to this question is not correct and there is no indication of how you got it. Having apparently reasoned out the preceding, it's difficult to undersatand how you got this ...
OK. Now I think I see. You appear to have added the velocity of the ball after 1 second to the initial velocity.
You are indeed misreading the question. Check the link at the end. You started out on the right track then got sidetracked.*@
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During the first two seconds, what therefore is its average velocity?
answer/question/discussion: ->->->->->->->->->->->-> :
(15 m/s + 40 m/s) / 2 = 27.5 m/s
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How far does it therefore rise in the first two seconds?
answer/question/discussion: ->->->->->->->->->->->-> :
1.6 meters
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What will be its velocity at the end of an additional second, and at the end of one more additional second?
answer/question/discussion: ->->->->->->->->->->->-> :
I dont understand what this question is asking.
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At what instant does the ball reach its maximum height, and how high has it risen by that instant?
answer/question/discussion: ->->->->->->->->->->->-> :
At the highest point, v = 0
0 - 25 m/s^2 / (2(-10) = 1.25 m
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What is its average velocity for the first four seconds, and how high is it at the end of the fourth second?
answer/question/discussion: ->->->->->->->->->->->-> :
I attempted the first few questions on this assignment, but I have a strong feeling that they are wrong. I am confused about this subject and am working to get a better understanding on how to correctly calculate the values. After spending almost an hour trying to figure out these answers, I feel that it is best if I take the time to research the subject and get a better understanding.
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How high will it be at the end of the sixth second?
answer/question/discussion: ->->->->->->->->->->->-> :
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*#&!*#&!
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&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new 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. &#
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