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course phy241
10/24 3
Questions about lab`qx001. Most of you found that the period of motion for the balance when the large paperclip was suspended in water was less than that for the straightened small paperclip. What were the two periods, and what was the ratio of the two?
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Small Paperclip
1st:7
2nd:7
Large Paperclip
1st:2
2nd:2
Ratio(large:small) 1:3.5
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`qx002. Which system experiences the greater change in buoyant force when the clip goes a centimeter deeper.
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Large paperclip system, because it has more paperclip in the water
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`qx003. Give your best explanation why you would expect the system with the large suspended paperclip to have the shorter period.
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Because there is more of a weight shift
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`qx004. Speculate on whether the period of motion would remain constant through several cycles, if instead of a paperclip or wire the suspended object was a thin metal cone. What difference would it make if the cone was suspended from its apex as opposed to its base? What if instead of a cone the suspended object was a sphere? These are big open questions that can easily go beyond the scope of this course so don't spend an inordinate amount of time thinking about them, but do give the cone some thought. Hint: how would the buoyant force change with the depth to which the object is suspended in the water?
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well if the cone is full submerged i dont think that it would be constant for the reason of the shape of the cone. When the flat side of the cone is not going to cut through the water like the tip would.So if it is suspended from the flat in there will be more drag coming out and if its submerged from the tip its not going to want to go in the water as easily. After it goes through a few cycles that extra drag will make even more of a difference.A sphere would have a constant period.
You should also be thinking about how the buoyant force changes.