Model Boat Mayhem

Mess Deck: General Section => Chit-Chat => Topic started by: Neil on December 10, 2014, 10:11:13 am

Title: MATHEMATICS HELP URGENTLY NEEDED
Post by: Neil on December 10, 2014, 10:11:13 am

hI, I have a few problems with  an assignment I am doing AND CAN'T   seem to grasp the problems of Factorisation in algebra.

Can any one out there help me please, and urgently. first question

The Bending moment ( M )  of a Beam at any given displacement (x) in m across the bridge is given by M = -20X^ - 500X + 3000

1)FACTORIZE THE EQUATION.

2) Expand your answer to check your answers are correct ( remember your working out)

3)Using the Factorization answer in 1) solve the equation to find out where the bending moment is Zero ( M = 0 )

quote your answers to 3 significant figures



any serious help please would be gratefully accepted............and I could do with a few more answering similarly. cheers, neil.

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Brian60 on December 10, 2014, 10:19:25 am

I'm not good at algebra and usually turn to the tinterweb for help with anything I need. Does this link explain it better for you Neil?......


http://www.mathsisfun.com/algebra/factoring.html

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Neil on December 10, 2014, 11:03:03 am

thanks brian, that has helped significantly. cheers, neil

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: adamD98 on December 10, 2014, 05:06:23 pm

I'd recommend a book called Engineering Mathematics by K.A. Stroud.


Depending on the course you are doing of course.

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: TomHugill on December 10, 2014, 05:08:23 pm

Stroud got me through my engineering degree highly recommended!

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: TomHugill on December 10, 2014, 05:11:16 pm

By x^ do you mean x^2 or cubed etc? Hopefully squared as then it's just solving a quadratic

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Neil on December 10, 2014, 06:12:44 pm

thanks guys.............and yes tom.....meant squared.........all sorted now, thanks.............had a brain malfunction, lol......cheers for help neil.

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Tug-Kenny RIP on December 10, 2014, 07:55:42 pm

Which part of  'Lifeboats'  would all this refer to.    %)

regards

Ken

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Nordsee on December 14, 2014, 08:53:23 pm

He is asking about the Bendy bit between the waffle flange and the Wobble Gasket. Goodness, I thought everyone knew that!

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Neil on December 14, 2014, 09:03:32 pm

Quote from: Tug---Kenny on December 10, 2014, 07:55:42 pm

Which part of  'Lifeboats'  would all this refer to.    %)

regards

Ken

nordsee got it perfectly Ken,  {-) {-) {-) {-) {-)

Title: Re: MATHEMATICS HELP URGENTLY NEEDED
Post by: Umi_Ryuzuki on December 15, 2014, 06:46:49 am

Good gosh,

I had flashbacks of loading, and shear diagrams, and wanted to question whether
this was a simple load, or cantilevered load, what is your dead load, and live load, uniform load...
Was the beam to be wood, standard lumber or heavy timber, or metal?
Vmax, Mmax, Section Modulus...
(http://cur.cursors-4u.net/smilies/images1/smi20.gif)
(http://www.globalsecurity.org/military/library/policy/army/fm/3-34-343/e-18.gif)