Oranges and drywall

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OK, PF, I have an argument to settle and I need some expert advice.
A friend of mine claims that it is possible to throw an orange through a 1/2" sheet of drywall (gypsum board); several other friends refute his claim. I would like to do the math to prove/disprove the theory, but my line of work doesn't give me a lot of practice with the physics of such dynamic elements.

Question to the forum: how would I go about setting up an equation solve for this problem.

Thanks in advance!
 

Answers and Replies

  • #2
Khashishi
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Why don't you just give it a try?
 
  • #3
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Why don't you just give it a try?
That's the next step. But if I find out how much force is necessary and it is more than a human arm can supply, then I will have to build a cannon of sorts to achieve what man cannot. :biggrin:
 
  • #4
berkeman
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OK, PF, I have an argument to settle and I need some expert advice.
A friend of mine claims that it is possible to throw an orange through a 1/2" sheet of drywall (gypsum board); several other friends refute his claim. I would like to do the math to prove/disprove the theory, but my line of work doesn't give me a lot of practice with the physics of such dynamic elements.

Question to the forum: how would I go about setting up an equation solve for this problem.

Thanks in advance!
1/2" drywall is not very strong. Especially if you freeze the orange first... :smile:
 
  • #5
AlephZero
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Especially if you freeze the orange first... :smile:
And don't forget that if a baseball pitcher or a cricket fast bowler did the experiment, the orange would hit the drywall traveling at more than 90 mph.
 
  • #6
CWatters
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Perhaps google for the impact properties of drywall. If you can't find them you will have to do the experiment.
 
  • #7
sophiecentaur
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Don't try this at home, folks!
 
  • #8
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That's the next step. But if I find out how much force is necessary and it is more than a human arm can supply, then I will have to build a cannon of sorts to achieve what man cannot. :biggrin:
Uh, this seems to be outside the conditions of the OP... ? I refer to the word "throw"...
 
  • #9
meBigGuy
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The question becomes one of whether the orange will fly apart from the acceleration or air turbulence before it gets enough momentum to break the drywall.

http://www.gypsum.org/wp/wp-content/uploads/2011/11/GA-235-10.pdf [Broken] talks about drywall strength.
I'd have to learn more about the methods used for measurement of Effective Modulus of Rupture (MOR) per ASTM C 1396 to understand how to apply the numbers.

Are you considering a freestanding 4x8 sheet? or one nailed to 17" studs?
 
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  • #10
phyzguy
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Only somewhat related, but I love this movie of a cannon firing a 2x4 through a brick wall.

 
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