WWA Info Exchange

For Woodworkers By Woodworkers
It is currently Thu Mar 28, 2024 3:27 pm

All times are UTC - 5 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: If I have a 12 inch...
PostPosted: Sat Apr 03, 2010 5:23 pm 
Offline
ModerDude/
User avatar

Joined: Tue Mar 26, 2002 1:01 am
Posts: 4125
Location: London, England
...square piece of wood, what is the minimum number of 1 inch holes I will have to bore through it to reduce its weight by half?

Ralph :wink:

_________________
...Did I mention it rains here?

our other interests:
http://ralphsworkshop.blogspot.com/
http://notinmyfridge.blogspot.co.uk
https://my-meccano.blogspot.co.uk


Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 03, 2010 6:35 pm 
Offline
Veteran
User avatar

Joined: Fri Mar 17, 2000 1:01 am
Posts: 2384
Location: Oxford, GA USA
OK Ralph, here is my incorrect answer -
The thickness and the density of the wood does not mater. We only need to reduce the area of the wood by 1/2.

12 X 12 = 144 sq. inches Reduced by 1/2 would be 72 inches.

a 1 inch hole has an area of PI * R(2) = 3.1417 * 1/4 = .7854.... sq. inches

72 / .7854... = 91.67..... holes

So we need to drill 91 holes all the way through the board and 1 hole .67 of the way through.

Probably wrong but that's my answer. :-D :D

_________________
C J K
in beautiful -
Oxford GA, USA


Top
 Profile  
 
 Post subject:
PostPosted: Sun Apr 04, 2010 8:55 am 
Offline
Veteran
User avatar

Joined: Mon Jun 18, 2007 5:35 pm
Posts: 3620
Location: Hutchinson Ks
I must admit, I thought 91- 1/2 one inch holes seemed like an awful lot! :shock: But, after trying to prove Chuck wrong and not being able to do it,He must be right!! :shock: :shock: :shock:

Rog

_________________
Dont badmouth no strangers, they just friends you aint met yet.

An ounce of responsibility is worth a pound of State and Federal laws.

I spent most of my money on woodworking
tools and beer, the rest I just wasted.


Top
 Profile  
 
 Post subject:
PostPosted: Sun Apr 04, 2010 4:52 pm 
Offline
ModerDude/
User avatar

Joined: Tue Mar 26, 2002 1:01 am
Posts: 4125
Location: London, England
I thought it was time for an easy one!

Chuck gets a point full of holes!

Ralph :wink:

_________________
...Did I mention it rains here?

our other interests:
http://ralphsworkshop.blogspot.com/
http://notinmyfridge.blogspot.co.uk
https://my-meccano.blogspot.co.uk


Top
 Profile  
 
 Post subject:
PostPosted: Sun Apr 04, 2010 5:25 pm 
Offline
Veteran
User avatar

Joined: Fri Mar 17, 2000 1:01 am
Posts: 2384
Location: Oxford, GA USA
Wow!! I actually got one. Thanks Ralph. I will cherish it for ever.

_________________
C J K
in beautiful -
Oxford GA, USA


Top
 Profile  
 
 Post subject:
PostPosted: Sun Apr 04, 2010 5:28 pm 
Offline
ModerDude/
User avatar

Joined: Tue Mar 26, 2002 1:01 am
Posts: 4125
Location: London, England
Don't let it dry out - soggy points are the opposite to Gremlins :D

Ralph :wink:

_________________
...Did I mention it rains here?

our other interests:
http://ralphsworkshop.blogspot.com/
http://notinmyfridge.blogspot.co.uk
https://my-meccano.blogspot.co.uk


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 20 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group