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Old 09-15-2015, 07:24 PM   #11710
footfootfoot
To shreds, you say?
 
Join Date: Aug 2004
Location: in the house and on the street-how many, many feet we meet!
Posts: 18,449
The force is concentrated at the tip.
A joule is the energy required to accelerate a 1 kg mass at 1 m·s−2 through a 1 m distance in space. (It is equal to the energy transferred (or work done) to an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre)


Let's say that splinter weighs about 5kg.
Let's say the tip is about one square cm.
A hurricane's wind speed can be from about 120km/hr to 250km/hr depending on the category
And let's say the the splinter traveled 1000 meters before it made contact.

5kg*(1000*1000)/(69*69) distance squared by time traveled squared >250km/h=69km/s
5kg*1,000,000/4761 (4761 is also known as Gravdigr's constant i.e. 69 squared)
5kg*210=1050 joules

Compressive strength of fully cured concrete (>10years) is 489 kg/cm2 and about 300 kg/cm2 for fresh

1050 joules = 10707 kgf/cm2

BAM!

That's why an oxy acetylene potato gun can shoot a potato through a 3/4" sheet of CDX plywood.
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Last edited by footfootfoot; 09-15-2015 at 07:37 PM.
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