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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
1 48,244
I have learnt in 1st year that the under-damped simple harmonic motion can be described by the differential equation ...
Sep6-14 09:34 AM
Philip Wood
5 303
Hi guys, I was working on a formula for the optimal angle for simple point-like projectiles free-falling under a...
Sep6-14 04:42 AM
1 171
Need to know about coefficient of friction for my exam. ...
Sep5-14 05:34 PM
2 176
I was reading Cengel's thermodynamics and noticed that he uses a thought experiment to show that there is no machine...
Sep5-14 03:51 PM
1 181
I've only recently started learning basic electrodynamics, but I don't understand why a loop of coil with a small area...
Sep5-14 11:51 AM
Philip Wood
1 254
Say you have a paramagnetic (or diamagnetic) sphere (or some other shape) and you apply a field of H = 10 Oe. Now, we...
Sep5-14 09:01 AM
3 210
The physics textbook i'm working with doesn't seem to give me the required background for working with and...
Sep5-14 05:13 AM
Philip Wood
2 242
I have a homework problem I need help with. I don't want the answer given to me since I know I can answer it with the...
Sep5-14 04:59 AM
6 224
Hello everyone, Assume that you have a flat plate, that is moving up and down in a sinusoidal motion with the...
Sep5-14 01:47 AM
1 205
This was something mentioned in an electronics class today (it's an oscilloscope). I didn't copy it down when I...
Sep5-14 12:07 AM
1 176
i ran a simulation that calculates the trajectory of a particle in the presence of a magnetic field from maxwells...
Sep4-14 11:43 PM
5 370
I am learning about transformers and from everything I've read I can see how its possible to create a 180 degree phase...
Sep4-14 07:51 PM
4 235
Hello guys, I've had the following discussion at work: We are currently using a suture with a nylon thread on a...
Sep4-14 07:08 AM
Simon Bridge
3 204
I have been noticing a few examples of systems that can extract energy or do useful work from seemingly random...
Sep3-14 10:43 PM
18 372
Question: A bullet is fired horizontally aiming at an object which starts falling at the instant the bullet is fired....
Sep3-14 10:14 AM
4 260
I want to derive some equations for a 2-D airplane's motion, specifically when it lifts off and lands. Can someone...
Sep3-14 02:28 AM
Simon Bridge
4 259
Hello, this is my first post. I'm not a big fan of long introductions, so I'm going to spare you my life story, for...
Sep2-14 10:10 PM
5 261
This will probably end up being a stupid question with a simple answer, but if you don't ask and just accept things...
Sep2-14 06:17 PM
Andy Resnick
6 269
What does p = mv really mean? For example, why is there a physical law based upon the product of mass and velocity?...
Sep2-14 05:59 PM
69 2,263
Hey everyone, I'm currently working on a project to construct the Bessel function of a vibrating surface of water in a...
Sep2-14 10:18 AM
Andy Resnick
1 264
So, I'm attempting to programm orbit in Unity game engine. So I need equation that shows r and phi depending on time. ...
Sep1-14 03:15 PM
9 271
A free rigid body (no forces/torques acting on it) has a constant angular momentum. And yet, I am puzzled because...
Sep1-14 02:42 PM
9 466
One particular experiment that I remember from a visit to a Science Center is the one involving a revolving platform...
Sep1-14 02:02 PM
43 927
If we had a van de graaff generator, near the sphere there is a metal plate ( not touching) and it's wired to the...
Sep1-14 11:10 AM
7 212
My textbook says that the value of the coefficient of friction lies between 0.1 and 1.5. But I see no reason why it...
Sep1-14 09:51 AM
Murtuza Tipu
7 285
I am trying to make a fiber laser's dispersive beam into a collimated beam by using a convex lens (BBAR, f = 30 mm),...
Sep1-14 07:30 AM
0 161
A wooden box on a weighing scale weighs 1 kg. Inside the box is a gyroscope which is set spinning, and the box is now...
Sep1-14 06:35 AM
5 218
A disk of mass M and radius R is held up by a massless string. (The two ends of the string are connected to a ceiling...
Sep1-14 12:38 AM
Simon Bridge
3 192
I was wondering if we can somehow use the formula Potential Energy = 1/2K(x(x=Amplitude))^2 for a pendulum if we are...
Aug31-14 06:53 PM
4 166
Two electrons, they have their electric fields and magnetic dipole moments. Their electric field is proportional to...
Aug31-14 08:02 AM
Simon Bridge
14 340 The dipoles that produce the transmitted (refracted) light...
Aug31-14 03:55 AM
7 260
From what I know, the pressure of a gas is due to the collisions of its molecules against a surface. So I don't...
Aug30-14 12:05 PM
Simon Bridge
6 237
My friend and I had this question and after physics-fighting each other we came to a conclusion that the feather...
Aug30-14 08:08 AM
7 293
One way to solve the simple LC circuit with 1 inductor and 1 capacitor is to use the Lagrangian formulation of...
Aug30-14 07:04 AM
3 243
Hey guys can someone please give me a good explanation on why in an RC circuit the resistor voltage is leading the...
Aug30-14 06:51 AM
5 193
Wikipedia claims that the Chandler wobble (a deviation of the angular velocity vector of the Earth with respect to the...
Aug30-14 04:32 AM
2 246
Dear Experts, When we launch a satellite, we launch it from earth which is spinning, so the tangential velocity...
Aug30-14 03:35 AM
10 253
Could anyone please explain or advice me where to read about principles of Schlieren image formation NOT in terms of...
Aug29-14 09:19 PM
Steve Drake
1 177
Hello Forum, The numerical aperture NA of a lens is usually a parameter (adimensional) that indicates the lens...
Aug29-14 06:20 PM
1 160
So I'm looking at the hessian of the Newtonian potential: \partial^2\phi / \partial x_i \partial x_j Using the...
Aug29-14 05:15 PM
2 165

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