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Author Topic:   Using your common sense to solve a physics problem.
riVeRraT
Member (Idle past 416 days)
Posts: 5788
From: NY USA
Joined: 05-09-2004


Message 91 of 188 (144558)
09-24-2004 9:31 PM
Reply to: Message 81 by Rei
09-24-2004 5:24 PM


Again, we didn't discuss nut or rod sizes, and I didn't engineer the whole thing from the start. Its called a trick question, and it didn't even give enough information to figure out the correct answer, like rod sizes, and wieght of the catwalk.
Its just hogwash.

This message is a reply to:
 Message 81 by Rei, posted 09-24-2004 5:24 PM Rei has replied

Replies to this message:
 Message 95 by Rei, posted 09-24-2004 9:43 PM riVeRraT has replied

riVeRraT
Member (Idle past 416 days)
Posts: 5788
From: NY USA
Joined: 05-09-2004


Message 92 of 188 (144559)
09-24-2004 9:32 PM
Reply to: Message 82 by nator
09-24-2004 5:28 PM


The NEWS REPORTERS are telling you, usually really poorly, the results of some study.
If you decide to change your behavior based upon hearing a soundbite you heard on the evening news, that's your problem.
Oh how I hate the news. Its all BS.

This message is a reply to:
 Message 82 by nator, posted 09-24-2004 5:28 PM nator has not replied

riVeRraT
Member (Idle past 416 days)
Posts: 5788
From: NY USA
Joined: 05-09-2004


Message 93 of 188 (144561)
09-24-2004 9:40 PM
Reply to: Message 84 by Percy
09-24-2004 5:32 PM


That last point is counterintuitive, isn't it? That's why this problem is such a wonderful example of the insufficiency of common sense for much of problem solving. You've discovered that your common sense has failed you, and that your lack of knowledge has become a significant obstacle. You've been reduced to slogging your way through what is actually an extremely simple problem in mechanics. And you can't even cite your lack of college training on this one, because this is basic high school physics.
I dropped out of 10th grade, never even made it through 10th. I was too rapped up in hanging out, and smoking pot, because my parents were to busy arguing with each other. Then I started working and never went back to school. It sucks because I could have been good in college.
So I never even took physics in HS. I could however figure this whole thing out on my own, without any formulas, and just using whats at the scene of the accident. My common sense would lead me through. This would be a great undertaking, I know, and I will never get to prove it.
But I enjoyed this problem so far. I fully understand all the forces on the car and what happened. I just don't know how to express it verbally, or mathematically using the formulas given.
This still doesn't stop me from knowing what happened.
I want everyone to just stop thinking that I hate engineers, and scientists, and whatever. Thats not the case, and I have great respect for the good ones out there, as well as all the knowledge gained over the years from all the work done by the great ones.
Thats all I can tell you from and its coming from a jerk Christian

This message is a reply to:
 Message 84 by Percy, posted 09-24-2004 5:32 PM Percy has not replied

Replies to this message:
 Message 94 by NosyNed, posted 09-24-2004 9:42 PM riVeRraT has replied

NosyNed
Member
Posts: 8996
From: Canada
Joined: 04-04-2003


Message 94 of 188 (144562)
09-24-2004 9:42 PM
Reply to: Message 93 by riVeRraT
09-24-2004 9:40 PM


Probably
I could have been good in college.
You know, there are hints that this is correct. You have a long way to go to be able to apply the talent you may have but it might be there.
You're going to have to listen to some input a lot better than you have though. You'll have to stop assuming that you know a lot more than you actually do.
You'll have to be able to handle some deeply disturbing, to you, ideas and understand the logic behind them.
It's a lot. Good luck.

This message is a reply to:
 Message 93 by riVeRraT, posted 09-24-2004 9:40 PM riVeRraT has replied

Replies to this message:
 Message 108 by riVeRraT, posted 09-25-2004 8:57 AM NosyNed has replied

Rei
Member (Idle past 7013 days)
Posts: 1546
From: Iowa City, IA
Joined: 09-03-2003


Message 95 of 188 (144563)
09-24-2004 9:43 PM
Reply to: Message 91 by riVeRraT
09-24-2004 9:31 PM


I asked you for the rammificatoins of the change. You said that the rammifications were that it had to support a few more inches of rod and an extra nut. You never even mentioned the increased tensile load on the first nut. Are you going to try and claim that you thought of it, but didn't think it was important enough to mention it? Because it most definitely was a serious ramification.

"Illuminant light,
illuminate me."

This message is a reply to:
 Message 91 by riVeRraT, posted 09-24-2004 9:31 PM riVeRraT has replied

Replies to this message:
 Message 111 by riVeRraT, posted 09-25-2004 11:53 AM Rei has replied

riVeRraT
Member (Idle past 416 days)
Posts: 5788
From: NY USA
Joined: 05-09-2004


Message 96 of 188 (144567)
09-24-2004 10:12 PM
Reply to: Message 87 by NosyNed
09-24-2004 8:02 PM


Re: Good and bad
I can agree on all that, thanks for the input.
I do respect your opinion.

This message is a reply to:
 Message 87 by NosyNed, posted 09-24-2004 8:02 PM NosyNed has not replied

riVeRraT
Member (Idle past 416 days)
Posts: 5788
From: NY USA
Joined: 05-09-2004


Message 97 of 188 (144568)
09-24-2004 10:15 PM
Reply to: Message 88 by nator
09-24-2004 8:07 PM


revelation, schraff is the talkorigins poster girl
Thanks schraff, I really wish I had the time to go to college. If I did it would be more aimed at my current profession.

This message is a reply to:
 Message 88 by nator, posted 09-24-2004 8:07 PM nator has not replied

DrJones*
Member
Posts: 2284
From: Edmonton, Alberta, Canada
Joined: 08-19-2004
Member Rating: 6.8


Message 98 of 188 (144575)
09-24-2004 11:09 PM
Reply to: Message 90 by riVeRraT
09-24-2004 9:12 PM


I'm saying gravity is straight down. They use the perpendicular pull on gravity relative the surface of the earth to figure the force on the car. If gravity is not exactly perpendicular, its affect is different.
Ok, now I see that you're on the right track you're just wording it in a confusing manner. I'll put up my step-by-step solution in about 3 hours unless theres any objections?

This message is a reply to:
 Message 90 by riVeRraT, posted 09-24-2004 9:12 PM riVeRraT has replied

Replies to this message:
 Message 112 by riVeRraT, posted 09-25-2004 11:55 AM DrJones* has not replied

Rrhain
Member
Posts: 6351
From: San Diego, CA, USA
Joined: 05-03-2003


Message 99 of 188 (144579)
09-25-2004 12:03 AM
Reply to: Message 62 by Ooook!
09-24-2004 5:39 AM


Re: Another example of common sense...
Ooook! writes:
quote:
On a slightly different note : Does anyone have any non-physics/maths problems that could be set ?
Two common, seven-letter words, each of which has eight words within. One is different from another and therein lies the answer.

Rrhain
WWJD? JWRTFM!

This message is a reply to:
 Message 62 by Ooook!, posted 09-24-2004 5:39 AM Ooook! has replied

Replies to this message:
 Message 100 by crashfrog, posted 09-25-2004 12:14 AM Rrhain has replied
 Message 107 by Ooook!, posted 09-25-2004 5:23 AM Rrhain has replied

crashfrog
Member (Idle past 1467 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 100 of 188 (144580)
09-25-2004 12:14 AM
Reply to: Message 99 by Rrhain
09-25-2004 12:03 AM


Two common, seven-letter words, each of which has eight words within. One is different from another and therein lies the answer.
Heights and weights?

This message is a reply to:
 Message 99 by Rrhain, posted 09-25-2004 12:03 AM Rrhain has replied

Replies to this message:
 Message 101 by Rrhain, posted 09-25-2004 12:25 AM crashfrog has replied

Rrhain
Member
Posts: 6351
From: San Diego, CA, USA
Joined: 05-03-2003


Message 101 of 188 (144582)
09-25-2004 12:25 AM
Reply to: Message 100 by crashfrog
09-25-2004 12:14 AM


crashfrog responds to me:
quote:
Heights and weights?
Clever, but not quite what I had in mind. That is, your words do contain the word "eight," but I said "eight words," and "eight" is singular in that it is only one word. When I said "eight words," I mean if you take the letters of the word, read them left to right, without re-ordering, you'd find eight words:
He, height, eight, eights...that's only four.

Rrhain
WWJD? JWRTFM!

This message is a reply to:
 Message 100 by crashfrog, posted 09-25-2004 12:14 AM crashfrog has replied

Replies to this message:
 Message 102 by crashfrog, posted 09-25-2004 12:29 AM Rrhain has replied

crashfrog
Member (Idle past 1467 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 102 of 188 (144583)
09-25-2004 12:29 AM
Reply to: Message 101 by Rrhain
09-25-2004 12:25 AM


Clever, but not quite what I had in mind.
Worth a shot.
Now that I understand your problem, it's too hard for me.

This message is a reply to:
 Message 101 by Rrhain, posted 09-25-2004 12:25 AM Rrhain has replied

Replies to this message:
 Message 103 by Rrhain, posted 09-25-2004 12:44 AM crashfrog has not replied

Rrhain
Member
Posts: 6351
From: San Diego, CA, USA
Joined: 05-03-2003


Message 103 of 188 (144585)
09-25-2004 12:44 AM
Reply to: Message 102 by crashfrog
09-25-2004 12:29 AM


crashfrog responds to me:
quote:
Now that I understand your problem, it's too hard for me.
No, it isn't.
Like the original physics question, you have all the information you need to solve the puzzle.
And no, I don't mean doing something like looking up words in a dictionary. Look at the puzzle again:
Two common, seven-letter words, each of which has eight words within. One is different from another and therein lies the answer.

Rrhain
WWJD? JWRTFM!

This message is a reply to:
 Message 102 by crashfrog, posted 09-25-2004 12:29 AM crashfrog has not replied

Replies to this message:
 Message 104 by jar, posted 09-25-2004 12:54 AM Rrhain has replied

jar
Member (Idle past 394 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 104 of 188 (144586)
09-25-2004 12:54 AM
Reply to: Message 103 by Rrhain
09-25-2004 12:44 AM


a
an
no
not
the
he
ether
her
the
he
her
there
here
herein
rein
in

Aslan is not a Tame Lion

This message is a reply to:
 Message 103 by Rrhain, posted 09-25-2004 12:44 AM Rrhain has replied

Replies to this message:
 Message 105 by Rrhain, posted 09-25-2004 1:16 AM jar has replied

Rrhain
Member
Posts: 6351
From: San Diego, CA, USA
Joined: 05-03-2003


Message 105 of 188 (144589)
09-25-2004 1:16 AM
Reply to: Message 104 by jar
09-25-2004 12:54 AM


Check your spelling, jar. "Ether" does not appear in "another."

Rrhain
WWJD? JWRTFM!

This message is a reply to:
 Message 104 by jar, posted 09-25-2004 12:54 AM jar has replied

Replies to this message:
 Message 109 by jar, posted 09-25-2004 9:54 AM Rrhain has not replied

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