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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 48,230
I posted a question as thus : A train moving at 100 km/hr uniformly decelerates at a rate of 10 km/hr each hr. How...
May5-07 09:13 AM
ZapperZ
7 1,659
Here's the problem: you've got two carts sliding along frictionless tracks at an equal speed, etc... as they move...
Dec19-10 06:40 AM
Doc Al
15 2,673
say you have a very very long (or infinite) straight wire the carried a charge (glued to the wire) and the wire moves...
Aug6-12 03:28 PM
bigerst
4 984
im reading introduction to electrodynmics by griffiths, the math techniques used is sloppy to the point of...
Aug7-12 06:52 PM
bigerst
9 1,133
is it possible to construct a system with only finite number of point charges of arbitrary magnitude at finite...
Aug18-12 10:15 AM
bigerst
2 1,010
what creates magnetic fields, magnetic poles or currents? are those theories equivalent mathematically? i read in...
Aug27-12 08:28 PM
BruceW
1 532
most(or all) proofs i have seen of gauss's law is based on coulumb's law. however coulumb's law is based off of...
Sep3-12 05:01 PM
bigerst
3 866
i was reading about derivation of Euler's equations for rotational dynamics (john taylor, classical mechanics, chapter...
Nov18-12 11:18 PM
bigerst
0 930
I'm just uncertain (haha), what IS newton's Second law exactly? F=ma, or F=dp/dt, aren't these defining equations for...
Jan24-13 06:21 AM
Jano L.
12 1,721
i am currently reading griffith's book on electrodynamics, though he does an excellent job with the theory (along with...
Jan25-13 11:09 PM
bigerst
0 395
Hello I'm having a little bit of trouble with so-called rest frames. I will distinguish two cases. consider...
Mar30-13 08:17 AM
mfb
1 469
I got stuck going over the derivation of fictitious forces in rotating frames. see specifically ...
Apr1-13 10:57 AM
BruceW
1 439
D=Drag Coefficient p=Density of air A=Cross sectional area v=velocity a=acceleration F= force F air=(DpAv^2)/2...
Oct7-10 07:48 AM
tiny-tim
1 1,574
I have read that air pressure is about 100,000 pascalls which = 100,000 newtons/m2 which is enough to accelarate a...
Sep17-05 05:04 PM
Astronuc
5 6,069
I'm a little confused about "voltage". We learned that voltage is somewhat similar to electric field: a way to refer...
Nov11-08 12:32 AM
jtbell
7 1,859
Good day, I happened across an interesting interactive JAVA applet demonstrating the diffraction of light through a...
Apr18-06 06:48 AM
BigMonkey
3 1,847
This is a concept that has always eluded me. I'm a Biologist who works in the Pharmaceutical Industry and I need to...
Aug21-07 03:02 AM
Imagelist
15 3,616
hello everyone. Can anyone please help with following questions? 1. Can coefficient of friction (both static and...
Nov3-13 01:30 PM
clem
1 444
Hello all, I officiate high school and college basketball. One of our rules concerning a dribble states...
Oct30-07 02:09 PM
berkeman
3 1,146
These problems are really giving me fits, I would really appreciate some help. A 12200 kg sailboat experiences an...
Sep22-04 01:11 AM
Simonnava
5 4,052
Hello All.... I am just wondering about something. The lift equation is, L= \frac {C_L \rho A V^2} 2 ...
Oct24-07 04:31 AM
white flock
4 12,477
Hi, in class we were talking about lenses and how there is a certain focal length where all images 'far enough' away...
Mar19-11 03:53 PM
Andy Resnick
1 1,010
Dear friends, and science lovers, I am doing some statics problems with moment( cross-product).And I've been...
Nov16-13 01:51 PM
jhae2.718
1 637
Someones like teachers in my country says energy is vector and scalar . Is that true ? Anyone can prov that ?
Oct23-12 08:02 AM
Studiot
7 11,746
Hello all . Why mater victory to anti/matter after big bang ? There is any relation to gravity ?
Nov28-12 04:16 AM
Drakkith
2 504
Hello all . I have two questions Energy can create force ? for apply a force we need energy ? Think about one...
Mar12-13 09:40 PM
DaleSpam
20 1,633
Hi there, I have noticed that when the wadding pool I work at is draining, a small whirlpool appears over the drain...
Jul12-11 10:20 AM
chrisbaird
1 1,406
Hi all, I am wandering if I can apply the Kramers-Kronig (KK) relations to the complex wavenumber k(ω) = k'(ω) + i...
Feb10-14 02:52 PM
maajdl
1 302
I need to calculate the the load F (in multiples of W) required to keep the link ABC in equilibrium under the action...
Sep27-10 11:43 PM
bijesh_msg
0 898
From theory, we know that Boltzmann entropy for a given distribution, defined through a set of occupancy numbers {ni},...
Dec21-12 09:08 AM
Rap
1 831
I was reading in my geology book (Earth: An Introduction To Physical Geography, 7th ed. by Tarbuck and Lutgens, 2002,...
Oct21-10 03:48 PM
Studiot
9 2,783
I am looking for educational derivation( or any available and detailed) of the key principle of statistical...
Apr23-08 01:28 AM
bilha nissenson
12 2,507
When a cue ball is driven into another ball, it is either not accelerating or decelerating at impact. It has momentum...
Aug9-11 12:14 AM
rcgldr
1 1,180
If I combine 2 laser beams of different wavelengths, would I get a beat frequency of the difference between the 2...
Oct15-11 02:46 PM
xts
2 1,224
I went for a run and measured time and distance. I wanted to estimate how many calories I used. Suppose a ran a...
Dec13-07 07:17 AM
Shooting Star
1 2,564
Hi I am new to this forum. I am an amateur blacksmith/machinist/all around tinkerer. I took a class with a...
May28-14 07:33 AM
Nugatory
4 247
Okay, first a brief intro. I studied math/physics extensively as an undergrad...but that was over 10 years ago now. ...
Sep3-10 09:08 PM
Bill M
2 940
Hello, I'm trying to figure out a method of calculating the work done by friction on an object sliding down a...
Feb17-11 04:32 AM
tiny-tim
14 4,021
If the crest of one light wave meets the trough of another light wave of the same frequency and intensity they...
Feb17-08 02:04 PM
Jakell
1 3,952
what exactly is the cut-off ratio, in physical terms?
Jan2-08 03:57 PM
brewnog
2 4,014

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