
Before posting anything, please review the Physics Forums Global Guidelines.
Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,229 
Does Dambler (hope I spelled it right) fore is a real force or just something we use to explain things that we can't...

Oct705 06:05 AM
Alkhimey

8 
1,433 
Sorry for that title, but what can I say, i'm gonna be mad to get the motion equation for some systems but always...

Mar2905 04:17 PM
Integral

21 
2,619 
Thanks for integral, he made the potential.pdf analyse for an analytical mechanic but i still have 2 questions,
1...

Apr605 10:34 PM
TheDestroyer

5 
1,269 
Hi there.
I'm having a problem explaining the physical meaning of the symbols in the equation for an underdamped...

Dec1907 10:06 PM
Cyrus

4 
1,729 
So my professor was discussing the case of a mass suspended from a vertical massless spring in some viscous liquid.
...

Apr613 05:56 PM
AlephZero

7 
650 
Hi,
in this article:
http://dx.doi.org/10.1016/S00219991(03)003085
damped molecular dynamics is used as a...

Nov1513 03:56 PM
AlephZero

1 
503 
For a simple damped oscillator...
\text {Apparently if } \beta \ll \omega_0 } \text { then ...}
\omega_d...

Oct2604 05:13 AM
arildno

3 
1,550 
one hamonic oscillator hava a merit factor Q = w/y. starting of equilibrium position , with velocity Vo. Calculate...

Nov1707 04:05 PM
freak_rj

0 
2,877 
In my notes, there are two sentences make me feel strange...
As we know, the pendulum whose length equals to that...

Jun1504 12:25 PM
turin

5 
4,066 
Hi!
The damped oscillator equation is as follows:
x(t)= A exp(γt/2) cos(ωt)
where ω= √( (w0)^2 + (γ^2)/4 )
I...

Oct1312 12:25 PM
Philip Wood

6 
662 
I am doing an experiment on the pendulum, and i wanted to do something on the damping, i understand a little as i have...

Aug2008 06:29 AM
amppatel

3 
2,164 
the solution for current I, for series LCR circuit is
I = (E/Z)sin(wt+\phi)
Where Z = \sqrt{R^2 + (X_{L}X_{C})^{2}}...

Jul2409 05:30 PM
Bob S

3 
6,272 
Hello everybody...
In my school textbook, I have the following explanation to Damped SHM:
\hline
Soving the...

Sep1004 07:01 AM
DivGradCurl

9 
1,836 
I am attempting to derive the equation for dampened harmonic motion from the differential equation:
m\frac{d^2...

Apr1309 04:25 PM
arildno

10 
2,708 
When a forced oscillation is damped, it is true that the frequency at which resonance occurs decreases right? so does...

Oct709 08:04 AM
FredGarvin

6 
25,645 
Hi
I'm looking for a place were I can find the damping coefficient for water. Maybe someone has/can find/knows a...

Aug709 02:55 PM
nasu

5 
14,332 
Hi,
I am working on a problem with a free hanging mass attached to a spring and damper in parallel. I believe my...

Jan1409 11:01 AM
skeleton

2 
5,667 
A 2.20 kg mass oscillates on a spring of force constant 250.0 N/m with a period of 0.615 s. Find the damping constant...

Feb210 04:55 PM
tyler.brown

0 
1,271 
A 0.300 kg mass moving the end of a spring with force constant 2.50 N/m is acted on by a damping force F=bv. If the...

Feb210 05:13 PM
tyler.brown

0 
772 
The position equation for a oscillator undergoing critical damping is given by
x(t) = Ate^(γt) + Be^(γt)
where...

May3014 10:18 AM
vanhees71

1 
192 
Hi, my question is about determining the damping ratio for the upper springdamper part of the system given in the...

Dec109 12:11 PM
SystemTheory

1 
2,808 
I have a transfer function for system.
23.23*s + 1.421
 = tf
s^2 + 25.88*s +...

Jul1010 10:02 AM
stevenb

2 
2,898 
Typically photon attenuation is determined by the equation I = I_0 \cdot e^{  (\mu \cdot z)}. The variable mu is...

Sep805 03:57 PM
ehild

5 
1,097 
I've got data that's force (g) against time for an SDOF system (with a bit of noise). The main thing I'm interested in...

Nov811 07:14 AM
AlephZero

1 
1,302 
Hello All,
I have some basic damping related questions that I am hoping you all can shed some light on or suggest...

Nov612 03:44 AM
K^2

5 
916 
Unfortunately, magnetic fields are by their nature invisible, but scientists from NASA’s Space Sciences Laboratory...

Jun308 11:37 PM
SF

2 
1,563 
Today I was outside to get some grass for my rabbit. I took some yellow dandelions too, but as I entered the elevator...

Apr1308 06:39 AM
Tachyonie

3 
1,588 
hi,
recently i notice that there is a dark border around all the streetlight at night. what is this phenomenon...

Feb1114 05:55 AM
Simon Bridge

2 
210 
I am doing a lab for my optics class. My group has chosen to set up a simple dark field imaging device using a HeNe...

Mar1109 07:47 AM
Andy Resnick

1 
841 
I was working on some dark field filters and I was wondering if you could substitute the black spot in the centre of a...

Apr709 06:28 PM
Andy Resnick

3 
950 
Hi, I've been doing Fraunhofer diffraction and I have been getting dark spots in the middle if my patterns, not...

May611 08:37 PM
Redbelly98

3 
828 
Hi Everyone,
I am trying to calculate the exit velocity of a dart which is propelled by compressed air. Please see...

May2312 06:38 AM
haruspex

1 
939 
does dB increases when voltage increases?can sum1 state or declare a formula or proof?

Feb2510 12:53 PM
Bob S

1 
2,017 
DC doesn't cause electromagnetism? That is what our teacher says. Can anyone explain why it doesn't? As far I remember...

Nov1109 02:59 PM
Dadface

11 
1,351 
To increase a DC generator's turning effect, we increase the number of turns of the coil. How does this increase the...

Sep2912 04:51 PM
Philip Wood

1 
1,361 
Hi, I have a question related to the DC motor that i hope you geniuses can help me with.
By Fleming's Left hand...

Sep2312 12:58 PM
sgstudent

6 
885 
Another intersting point on home electronics raised was  why does every device you purchase have it's own...

May1305 03:40 PM
zoobyshoe

39 
3,430 
hello ,
DC (I guess AC too) power supplies have 3 terminals: plus, ground, minus.
If I set the voltage to 30...

Sep2808 12:03 AM
Phrak

3 
9,216 
Hello, can someone please help me out here, i want to step up the voltage of a 1.5V battery to 300V, i know that to do...

Dec1207 03:53 PM
alvaros

1 
1,800 
de broglie wavelenth of a perticle approaches zero faster than 1/v as its speed approaches the speed of light..how can...

Oct809 02:02 PM
hasanhabibul

0 
605 