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#1 2005-03-08 19:55:12
- Su165
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Help ASAP
Can anyone give me a hand with this, cause I'm stumped and can't remember exactly how to go about solving this.
here's the eqn
m[d^2x/dt^2 + wsubo^2 x] = F cos wt
I'm supposed to show that x(t) = xsubo cos wt
w is the incident freq
wsubo is the resonant freq
m is mass
I'm guessing it has to be shown by undetermined coefficients but I can't find the right path exactly.
#2 2005-03-08 20:35:36
- MathsIsFun
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Re: Help ASAP
A bit outside my area, but I found a website that has ALL sorts of stuff about harmonic motion which could help here
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#3 2005-03-18 07:04:56
- Roraborealis
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Um...what kind of algebra is that?
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#4 2005-03-18 07:17:36
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The difficult kind ! It has calculus in it.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#5 2005-03-18 07:51:11
- Roraborealis
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Re: Help ASAP
How old are you expected to be to be at that standard?
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#6 2005-03-18 08:19:23
- MathsIsFun
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Re: Help ASAP
Depends on where you live. Some countries start Calculus in the final year of high school.
But usually Universities teach it in the first year.
I was thinking of putting a small introduction to it on this website.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#7 2005-03-18 08:24:07
- Roraborealis
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I'm only thirteen!
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#8 2005-03-18 08:47:45
- MathsIsFun
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You're doing well!
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#9 2005-03-19 04:30:54
- Roraborealis
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Re: Help ASAP
Thank you.....but how do you know....?
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?
#10 2005-03-19 07:52:27
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Re: Help ASAP
You noticed, and were curious about, the algebra. You write well, too.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#11 2005-03-20 06:35:19
- Roraborealis
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You're such a nice person!
School is practice for the future. Practice makes perfect. But - nobody's perfect, so why practice?