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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.
** 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: ->->->->->->->->->->->-> : It becomes greater until air resistance equals gravitational force.
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What happens to the net force acting on it?
answer/question/discussion: ->->->->->->->->->->->-> : It gets smaller until gravitational force = air resistance. At this time Fnet = 0.
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What happens to its acceleration?
answer/question/discussion: ->->->->->->->->->->->-> : It speeds up in the beginning but stops accelerating and attains constant velocity when gravitational force = air resistance.
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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: ->->->->->->->->->->->-> : It would accelerate longer and have a net force on it longer, so its terminal velocity would be greater than if it had been dropped from a
lower height.
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Air resistance depends only on speed.
Terminal velocity occurs when the air resistance is equal to the gravitational force.
Assuming that the height is not so great that air density changes significantly, this does not depend on the height from which the object is dropped.
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10-15 min
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9:58 am EST 7/14/14
&#Good responses. See my notes and let me know if you have questions. &#