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phy 231
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.
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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 will increase as the speed of the object increases.
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What happens to the net force acting on it?
answer/question/discussion: ->->->->->->->->->->->-> :
The force of gravity and the air resistance will both be acting on the wad, with g+ and -ar. The higher the velocity of the wad, the higher the air resistance.
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What happens to its acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
The acceleration initially will be equal to the force provided by gravity, but will slow down after being dropped due to the increase in air resistance.
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@& You've got it, but consider the following statement:
The magnitude of the net force decreases with increasing air resistance, so the magnitude of the acceleration decreases.*@
If it dropped from a much higher point, what would happen to the net force and the acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
The object will have time to speed up even more, but as it does so the air resistance. The Fnet of the weight due to gravity and the air resistance could possible equal zero as the air resistance increases. If force is equal to zero, m*a tells us that a has to equal zero as well.
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&#Your work looks good. See my notes. Let me know if you have any questions. &#