# Questions tagged [newtonian-mechanics]

Newtonian mechanics discusses the movement of classical bodies under the influence of forces by applying Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].

2,421 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
1k views

### The role of the virtual work principle

Lanczos' masterpiece "The Variational Principle of Mechanics" has, on page 76, the following statement: Postulate A (virtual work): The virtual work of the forces of reaction is always zero for any ...
• 3,993
364 views

### How can I approximate Jacobian Elliptic Functions in terms of basic integrable functions for the $\operatorname{SO}(3)$ rotation of a rigid body?

So, the rotation of a 3d body can be described with Euler's equations of motion giving the rotational velocity in components along the principal axes of inertia. As shown in f.ex. this paper, Euler ...
• 472
399 views

### Physics of the dead man's (or jellyfish) float

This question arised during a discussion with a friend, when I discovered that he cannot do the dead man's (or jellyfish) float, i.e. float horizontally on the water, not even when he was a child. ...
• 1,644
152 views

### What is the symmetry group of Mach's spacetime?

Newtonian spacetime can be modeled as a geometric object $M$ (affine space or manifold with connection with an absolute time function etc. etc.) that is symmetric under the action of the Galilean ...
• 381
314 views

### Euler-Lagrange equations for chain fountain

Most of us are familiar with chain fountains. I was wondering how this phenomenon is explained in the Lagrangian mechanics. I mean do we know how the Euler-Lagrange equations look like for this system?...
• 3,454
323 views

• 131
91 views

### Can a pendulum at resting equilibrium position still demonstrate the Earth's rotation?

I conducted an experiment in my youth, creating a 'sand pendulum' hanging from the bedroom ceiling to a bowl of flour. I did not set the pendulum into motion, but rather wanted to see if the force of ...