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post #1 of 32 (permalink) Old Sep 27th, 2005, 01:59 AM Thread Starter
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Calculus Help

Okay I have this problem I have to do, but the teacher never explained how to do it...apparently we're supposed to teach ourselves in this class.

Anyway... A plane goes from Chicago to St. Louis in five hours, then goes back in the same amount of time. I have to show that there is some point the plane will pass at the same time both ways.


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post #2 of 32 (permalink) Old Sep 27th, 2005, 02:02 AM
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Quote:
Originally Posted by Rtael
Okay I have this problem I have to do, but the teacher never explained how to do it...apparently we're supposed to teach ourselves in this class.

Anyway... A plane goes from Chicago to St. Louis in five hours, then goes back in the same amount of time. I have to show that there is some point the plane will pass at the same time both ways.
This sounds more like a physics problem to me, draw the vectors out and maybe apply the law of cosines, actually forget it. Nonetheless, it does sound like good old kinematics. since you arent given any directions I guess the vector free diagrams wont be of help. Sorry I wish I could help, throw me in some derivatives or integrals I'd probably still be able to tackle those.
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post #3 of 32 (permalink) Old Sep 27th, 2005, 02:03 AM Thread Starter
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I've already done the derivative problems, and we haven't learned integrals yet.


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post #4 of 32 (permalink) Old Sep 27th, 2005, 02:36 AM Thread Starter
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*bump*


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post #5 of 32 (permalink) Old Sep 27th, 2005, 02:39 AM
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That is why I took data management and probability.
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post #6 of 32 (permalink) Old Sep 27th, 2005, 02:41 AM Thread Starter
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Loser.


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post #7 of 32 (permalink) Old Sep 27th, 2005, 02:49 AM
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Loser.
I wouldnt call someone a loser just because they opted on taking some other mathematical course to replace calculus. Its really only useful to a handful of people, scientists, engineers(civil, structural, mechanical, actually probably all engineers, not so much computer engineers, there more logic oriented). However, the challenge of taking a calculus course is very rewarding especially if your mathematical skills arent very exhaustive.
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post #8 of 32 (permalink) Old Sep 27th, 2005, 02:56 AM Thread Starter
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I was just joking, dear.


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post #9 of 32 (permalink) Old Sep 27th, 2005, 03:06 AM
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I was just joking, dear.
I am sure you were!
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post #10 of 32 (permalink) Old Sep 27th, 2005, 04:52 AM
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AHHH I'm doing the same stuff. But this problem is...rather out of the ordinary. We are doing derivatives and soon, integrals...PUKE
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post #11 of 32 (permalink) Old Sep 27th, 2005, 05:22 AM
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More explanation?

Quote:
Originally Posted by Rtael
Okay I have this problem I have to do, but the teacher never explained how to do it...apparently we're supposed to teach ourselves in this class.

Anyway... A plane goes from Chicago to St. Louis in five hours, then goes back in the same amount of time. I have to show that there is some point the plane will pass at the same time both ways.

Hmmm... I want to help but I don't understand your explanation. Is this the correct problem? Was it written and can you add any information?
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post #12 of 32 (permalink) Old Sep 27th, 2005, 05:25 AM
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Quote:
Originally Posted by backhanddtl4
AHHH I'm doing the same stuff. But this problem is...rather out of the ordinary. We are doing derivatives and soon, integrals...PUKE
Integrals are better than derivatives trust me. No more implicit differentiation, thats the worst of the derivatives, well the applied forms can get funky like the related rate problems and max min applications. Trut me you'l love integrals until you get to the applications, volumes, area problems beyond those you will get on the typical standarized calculus tests Ap and IB.
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post #13 of 32 (permalink) Old Sep 27th, 2005, 05:26 AM
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Quote:
Originally Posted by drake3781
Hmmm... I want to help but I don't understand your explanation. Is this the correct problem? Was it written and can you add any information?
Right, it does seem like info is missing certainly some direction at least or Initial rates or velocities.
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post #14 of 32 (permalink) Old Sep 27th, 2005, 06:51 AM
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I'm assuming its a physical application question.

Yeah... there's definitely something missing. If you can find that missing bit, maybe we can help.
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post #15 of 32 (permalink) Old Sep 27th, 2005, 10:10 AM Thread Starter
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Well I guess I forgot to add that the plane takes the same route both ways, but I thought that would be assumed. Everything else is there. I'm supposed to show that there is a point on the route through which the plane passes at the same time on both trips.


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