[Blindmath] physics/mathematics problem; have a solution?

[Tami Kinney]

Amanda,

Congratulations.

I have not broken anything except for a fracture before I was legally 
blind, so it doesn't count even if it was because I couldn't see... Or 
could I???? Depends on who you ask. /lol/

However, while my patellae do remain in place and intact, I can reliably 
inform you that when one's patella impacts a hard surface of any kind, a 
loud noise is made that would cover even a total bone shattering sound. 
Many people will find inappropriateness in some of the sounds that 
occur. Also, it is unlikely that the owner of the patella in question 
will be interested in calculating physics on accounta being rather 
bitter about falling victim to the laws of it all. /grin/



On 12/19/2011 11:36 AM, Amanda Lacy wrote:
> I have one...Could I estimate the amount of force it would take for my
> patella to make a very audible "Crack!" on a hard tile floor or estimate
> the decibel level if I knew the force and the materials involved?
> Thankfully I haven't broken anything, unlike my sighted brother.
>
> Amanda
> ----- Original Message ----- From: "Steve Jacobson"
> <steve.jacobson at visi.com>
> To: "Blind Math list for those interested in mathematics"
> <blindmath at nfbnet.org>
> Sent: Monday, December 19, 2011 8:39 AM
> Subject: Re: [Blindmath] physics/mathematics problem; have a solution?
>
>
>> It sounds to me as though the real question is whether the mass is all
>> right and whether the mass has decent medical
>> coverage. <smile> It is my quite nonscientific observation that for
>> each time we do something that perhaps painfully
>> stretches our limits as well as other parts of our body, there are ten
>> times we have succeeded at doing something
>> others thought we couldn't do.
>>
>> Best regards,
>>
>> Steve Jacobson
>>
>> On Sun, 18 Dec 2011 21:14:00 -0800, David Engebretson Jr. wrote:
>>
>>> Physics problem - have a solution?:
>>
>>> Imagine a 68" object with a mass of 170 pounds travelling at 2.5
>>> miles per hour (assume the mass is evenly
>> distributed in the object in motion). The mass drops four feet and all
>> of the momentum and other forces are placed in a
>> single point on the object at 4 feet. Assume, also, that the bottom of
>> the mass lands at the bottom of the four foot hole
>> at the same time the impact upon the mass is inflicted upon the mass
>> (ignore any loss of energy due to the landing of
>> the mass in the bottome of the hole - the landing and the impact are
>> ALMOST instantaneous).
>>
>>> What is the amount of force that the mass absorbs at the time of impact?
>>
>>> You can also assume the mass is 20" wide at the "point" of impact.
>>
>>> In summary:
>>> The mass drops four feet travelling 2.5 mph. The impact area is 4
>>> feet up from the bottom of the mass. The impact
>> point is a single line 20" wide.
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>>
>>
>>
>>
>>
>>
>>
>>
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>
>
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