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Using your common sense to solve a physics problem.

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Author Topic:   Using your common sense to solve a physics problem.
crashfrog
Member (Idle past 1489 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003

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Message 10 of 188 (143954)
09-22-2004 8:05 PM 		Reply to: Message 8 by coffee_addict
09-22-2004 7:29 PM

Going back to my problem, everything that you need to solve the problem is there. You don't even need to know much about physics to be able to solve it. All you need to know is that the total force equals the addition of the individual forces involved.
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For example, say that F(total) is the total force, F(1) and F(2) are 2 individual forces at work, the equation would look something like:
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F(total) = F(1) + F(2).
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Doesn't force have both amplitude and direction, though? Doesn't that make it vector addition, not scalar addition?
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Or is that just implied?
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 Message 8 by coffee_addict, posted 09-22-2004 7:29 PM coffee_addict has replied
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crashfrog
Member (Idle past 1489 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003

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Message 32 of 188 (144218)
09-23-2004 6:53 PM 		Reply to: Message 25 by coffee_addict
09-23-2004 6:31 PM

You have to have the formula for it to be able to solve it.
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No, you could derive the forumla from the problem I presented, knowing as we do that we live on Earth.
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It would just take a long time. The problem is a lot harder to solve from first principles; so hard, in fact, that the odds that the untrained won't make a fatal error are very, very slim.
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crashfrog
Member (Idle past 1489 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003

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Message 49 of 188 (144335)
09-24-2004 12:29 AM 		Reply to: Message 48 by riVeRraT
09-24-2004 12:19 AM

I am not so sure that even the most learned engineer, or scientist would be able to do that on his own, with out going to college..
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Well, at some point, one of them had to, because how else would we be teaching it in college?
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Moreover, they realized that it's a huge fucking waste of time to re-invent the wheel every time you want to figure out a problem of kinematics. As far as I'm concerned, that realization makes them way smarter than you.
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crashfrog
Member (Idle past 1489 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003

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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.
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Heights and weights?
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crashfrog
Member (Idle past 1489 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003

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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.
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Worth a shot.
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Now that I understand your problem, it's too hard for me.
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