HELP WITH MATH!!!

Darkath · Posted: Wed Apr 28, 2004 6:11 pm Post subject: HELP WITH MATH!!!

I am in Precalculus, and have a test this Friday on the chapter we are on. We are doing a review (that's graded) that's due the day of the test, and I'm in a pickle with this one problem. The problem is exactly out of the book, so here it is.

I've spoken to a friend who did that problem, and he said the answer was 200√3/3 (as in, two-hundred times root 3 divided by 3, which comes out to be 115.47005383793 pounds of tension when approximated). So now that I have the answer, I need to know HOW to do it for the test. Keep in mind, this is Precalc so we are only supposed to solve the problems using only Law of Sines, Law of Cosines, and things of that sort.

HINT: The 24 inches I'm told by my math teacher has nothing to do with the problem, it's just there to throw you off

AND the chapter we are doing is on VECTORS, if it helps
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[HALO]MasterChief · Posted: Wed Apr 28, 2004 6:20 pm Post subject:

uhhhhhh
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PondScum007 · Posted: Wed Apr 28, 2004 6:37 pm Post subject:

how can the 200lb ingot be putting 230lbs of force on the hook though lol
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The Nanite · Posted: Wed Apr 28, 2004 6:41 pm Post subject:

i'd ask shockwave, he's like some super genious
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Jfet Zener · Server Admin Joined: 19 Feb 2003 Posts: 3353

solution coming...

its quick and rough and, although mathematically correct, its not perfect in notation.

Paddyjack · Posted: Wed Apr 28, 2004 6:48 pm Post subject:

And how old is the bus driver?
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shockwave · Posted: Wed Apr 28, 2004 7:47 pm Post subject:

Jfet beat me to the answer (and provided a much better way to look at it, I would have typed not scanned). You should state the answer as 115.47 lbs in each cable.

Jfet's answer is correct if you assume that the weight of the wire is negligible.
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IrishMan · Posted: Wed Apr 28, 2004 8:09 pm Post subject:

speaking of math, geometry is the devil. im doing Locus and loci right now...and all i have to say is.
W...
T...
F...

Jfet Zener · Server Admin Joined: 19 Feb 2003 Posts: 3353

sgt stutter · Posted: Wed Apr 28, 2004 8:29 pm Post subject:

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Darkath · Posted: Wed Apr 28, 2004 9:06 pm Post subject:

Thank you Jfet for doing that problem for me...you actually explained it better to me than my math teacher did

Those darn math teachers

Jfet = teh Math wiz

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Bright Red Nipples · Posted: Wed Apr 28, 2004 9:32 pm Post subject:

It's been 15 years since I took any calculus classes. Since I have applied it to nothing I have forgotten most of it. I do apply some of it to my work so it didn't all go to waste.
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Stevo · Posted: Wed Apr 28, 2004 10:27 pm Post subject:

Now it all makes sense. I didn't even know where to start.

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kubrick · Posted: Thu Apr 29, 2004 12:20 am Post subject:

Shovel me Silly · Posted: Thu Apr 29, 2004 1:02 pm Post subject:

That was a pretty easy straight forward problem, but I have taken two semesters of calculus based physics already. Next semester I'm taking statics which is exactly this kind of a problem except a lot more complicated. I can't wait.