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course Phy 121
cq_1_231#$&*
Phy 121
Your 'cq_1_23.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_23.1_labelMessages **
A wad of paper is dropped from a second-story balcony and falls through still air to the ground.
• As it speeds up, what happens to the air resistance it encounters?
answer/question/discussion: ->->->->->->->->->->->-> :
the air resistance changes proportionally to the velocity, so as the was speeds up the resistance increases.
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• What happens to the net force acting on it?
answer/question/discussion: ->->->->->->->->->->->-> :
gravity does not change, the air resistance will though
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• What happens to its acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
Acceleration will speed up but not change direction
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Acceleration can increase or decrease, but it can't speed up or slow down. Acceleration determines the rate at which the object speeds up or slows down.
What is the direction of the gravitational force?
&&&&&&Downward gravitational Force&&&&&&&
What is the direction of the force of air resistance?
&&&&&&&&Air resistance is opposite to gravitational force, so it is upward&&&&&&&
The magnitude of the air resistance increases. What does this do to the magnitude of the resultant vector?
&&&&The increasing air resistance makes the magnitude decrease while the magnitude of the vector decreases as the net force remains downward. &&&&&&&
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Specifically, the magnitude of the net force vector decreases, and as you say it does remain downward.
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What therefore are the implications for the acceleration.
&&&&&&The decrease in the net force makes the decrease in the magnitude of the acceleration&&&&&&&&&
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• If it dropped from a much higher point, what would happen to the net force and the acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
Net force and acceleration will continue to increase.
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Your answer to this question would be modified by your corrected answer to the last question, and should therefore have been modified.
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15 min
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&#Please see my notes and submit a copy of this document with revisions, comments and/or questions, and mark your insertions with &&&& (please mark each insertion at the beginning and at the end).
Be sure to include the entire document, including my notes.
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Check also the discussion at the given link; no revision is required.
&#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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