# Questions tagged [classical-mechanics]

Classical mechanics discusses the behaviour of macroscopic bodies under the influence of forces (without necessarily specifying the origin of these forces). If it's possible, USE MORE SPECIFIC TAGS like [newtonian-mechanics], [lagrangian-formalism], and [hamiltonian-formalism].

5,373 questions
Filter by
Sorted by
Tagged with
38 views

### Acceleration-Meter

I encountered a Physics Olympiad problem: A ball bearing rests on a ramp fixed to the top of a car which is accelerating horizontally. The position of the ball bearing relative to the ramp is used as ...
30 views

### What is the equation of motion of this question? [closed]

Determine the expressions for the kinetic and potential energies of this system using the counterclockwise rotation of each bar as the degrees of freedom. Do not assume small rotational angles and ...
23 views

### How to check the direction of friction in case of pure rolling

I was stuck in a question as follows: Here, I'm not able to understand that how to decide the direction of friction and about which point we should check the torque for the same purpose. Would ...
150 views

### In a general physical sense, the position of a particle is really a vector?

It's consistent define position of a particle in some frame as a vector or is just a Physics informality? Velocity and Acceleration can be added up and bring multiplied by real numbers an have ...
21 views

### Required power for a car

How much power is needed to accelerate a car from v0 to v1 in “t” seconds, given that it maintains a constant accerlation and air resistance and roll friction is not negligible? I’m not quite sure ...
17 views

### How to calculate the velocity and angular speed of a disk pulled by a rope? [closed]

I've seen a lot of questions about this situation but I can't find an answer. So you have a disk (radius: R = 100cm and mass: M =...
33 views

### Difference between finite and infinitesimal motion

I am studying Arnold Sommerfeld mechanics. Here they talk about finite and infinitesimal motion. Quoted from the text: The simplest example of a non-holonomic condition is furnished by a sharp ...
26 views

### Center of mass when surface mass density varies in 2 parameters [closed]

I found a question in my homework to solve which you have to find the center of mass of a semicircular disc. Specifics of the question in image However here the problem is that the density varies both ...
17 views

### Find partition function for a classical harmonic oscillator with time harmonic forcing

I have been trying to find partition function for classical harmonic oscillator with time harmonic forcing term and reached an expression. I want to know if I am correct. There is abundant ...
41 views

### A string struck by a hammer [closed]

I am having some trouble with my homework and there is just something I don't understand. The problem is a hammer striking a string with length $L$ vertically at speed $v$ on the location $a$, then ...
32 views

### A formula which relate spring constant to its physical properties like length and area of cross section

I know spring is a mechanical analogue of capacitor. And length of a spring is equivalent to plate seperation of capacitor. So what is the mechanical equivalent of area of cross section of capacitor ...
66 views

### What happens to the center of mass of a ice cube left on a table?

Let us assume we have a big ice cube on a rigid table(on Earth). After a while the ice cube will melt, if we are on Earth then the ice will get converted into water and spread on the table. ...
51 views

### When we push on a wall, can we say work is being done on the atomic particles in contact with our hand?

Since textbooks say work is act transfer of energy, it led me to think of the following assumption: Work is being done on the the atoms in the wall, in contact with the hands, when we push (hard) ...
49 views

### How to know charge of a particle from position and momentum?

It was mentioned in one documentary that the only think we need to know about a particle is it's position and momentum, so we can calculate every other quantity from this. If it is correct how do we ...
271 views

### Issues with Newton's third law and Euler's laws of motion

Consider a system of particles (index $i$). Let the force acting on each particle be $\mathbf{F}_i = \mathbf{F}_i^{e}+\sum_{j, j \neq i}\mathbf{f}_{ji}$, where $\mathbf{F}_i^{e}$ denotes the external ...
41 views

### Degenerate perturbation theory in classical mechanics

I would like to know if there is a way to properly do time-independent degenerate perturbation theory in classical mechanics. Any answer or pointer to a good source would be appreciated. The issue of ...