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Phy 121
Your 'cq_1_17.1' 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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cq_1_171
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Phy 121
Your 'cq_1_17.1' 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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Copy the problem below into a text editor or word processor.
• This form accepts only text so a text editor such as Notepad is fine.
• You might prefer for your own reasons to use a word processor (for example the formatting features might help you organize your answer and explanations), but note that formatting will be lost when you submit your work through the form.
• If you use a word processor avoid using special characters or symbols, which would require more of your time to create and will not be represented correctly by the form.
• As you will see within the first few assignments, there is an easily-learned keyboard-based shorthand that doesn't look quite as pretty as word-processor symbols, but which gets the job done much more efficiently.
You should enter your answers using the text editor or word processor. You will then copy-and-paste it into the box below, and submit.
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A steel ball rolls down a ramp and collides with a marble, as in the video. The marble is slightly smaller and quite a bit less massive than the ball.
• If they both experience the same force, which will have the greater acceleration?
answer/question/discussion: ->->->->->->->->->->->-> : ->->->->->->->->->->->-> :
The steel ball will have the greater acceleration.
&&&&&The marble will have the larger acceleration because it has less mass than the steel ball, which ultimately results in a greater acceleration. &&&&&
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• If the forces were exerted during identical time intervals, which would have the greater change in velocity?
answer/question/discussion: ->->->->->->->->->->->-> : ->->->->->->->->->->->-> :
If the forces were exerted during identical time intervals the marble will have the greater change in velocity.
&&&&&This is because it has a higher acceleration and it occurs in the same amount of time as the steel ball&&&&&
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Good.
You can also say that the magnitude of its impulse is the same, but with the lesser mass the magnitude of the velocity change must therefore be greater.
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The forces are exerted for the same time, since by Newton's Third Law the forces are equal and opposite and occur only while the objects are in contact.
If this premise is accepted, then your answers are inconsistent.
Before reading the attached document, think about this for a couple of minutes.
&#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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&#Good responses. See my notes and let me know if you have questions. &#