Arc Length for a metal project (1 Viewer)

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Hello everyone. I'm a metal worker trying to do the layout for a project using a few nice curves. To do that, I need to get arc length, but I'm having trouble finding it for f(x)=x^3. If anyone can give me a nudge in the right direction for integrating (1+(3x^2)^2)^1/2, it would be greatly appreciated. If not, I'll just have to cook up some easily integratable functions so I can get welding, but I'd prefer to work the other way around.

Thanks in advance,
Stephen.
 

benorin

Homework Helper
1,057
7
That integral involves an elliptic integral of the first kind, go to www.integrals.com and input (1+(3x^2)^2)^(1/2)
 
Thanks for the link, it's really handy. Since this is a metal project, and not a math one, I think I'll just avoid using that particular fuction, since I can get the lines I want without getting into such beastly integrations. Again, that link is great, and I'll be putting it in my toolbox. Thanks.
 

benorin

Homework Helper
1,057
7
Use also http://www.hostsrv.com/webmab/app1/MSP/quickmath/02/pageGenerate?site=quickmath&s1=calculus&s2=integrate&s3=advanced [Broken] has many free online math calculators: click on the links listed on the lefthand side of their home page.)
 
Last edited by a moderator:

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top