Date: Thu, 03 Jun 2004 12:56:58 -0600

Author: Jerry DiMarco

Subject: Re: buoyancy

Post:

I see what you mean now, I didn't explain that very well. But
hopefully Dick's answer will suffice...

Jerry


At 01:47 PM 6/3/2004, you wrote:
>>At 08:28 AM 6/3/2004, you wrote:
>>>>... Someone suggested that the key to understanding this experiment is
>>>>to realize that the center of mass of the system is falling when the
>>>>wood block is rising.
>>>
>>>When the wood block is rising, isn't the center-of-mass rising?
>>
>> What is your reasoning? The way I initially thought of it (and
>> somebody else pointed this out) was to think about where the water level
>> is before and after. Or imagine replacing the block of wood at the
>> bottom with a block of water the same size...
>
>My reasoning hinges on the phrase "when the wood block is rising" -- the
>water level doesn't change while it's rising. Granted, once it breaks the
>surface the level changes, but I thought your measurements recorded while
>the block was still submerged. -- Wolfgang
>
From reberg@physics.umd.edu Thu Jun 3 15:14:18 2004

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