Phy 201
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 resistance will increase as the object speeds up. I remember this point from a previous asst or experiment.
• What happens to the net force acting on it?
answer/question/discussion: ->->->->->->->->->->->-> : The net force will decrease. Acceleration should decrease as I have pointed out in the following answer and since f=mass(acceleration) the force would get smaller.
• What happens to its acceleration?
answer/question/discussion: ->->->->->->->->->->->-> : The acceleration would remain constant if wind resistance were not acting on it. If there is no resistance, there will be no change in acceleration, but if there is resistance which there would be in a normal situation, the acceleration would decrease because as the object speeds up the negative force should increase. I think I remember this point from a previous experiment.
• If it dropped from a much higher point, what would happen to the net force and the acceleration?
answer/question/discussion: ->->->->->->->->->->->-> : The same thing really, it would have a decreased net force as the velocity increased, due to the decreased acceleration. This seems to make sense theoretically, but I would think that as it falls the force it would have should increase since dropping something from higher tends to make more of an impact in the end. This may be that while the acceleration is decreasing, it is still accelerating. It wont loose the velocity it already had, so net force may actually increase when you think of it this way.
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15 mins
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Good answers. See also the link, but no revision should be necessary.
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Solution
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