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Newtonian mechanics covers the discussion of the movement of classical bodies under the influence of forces by making use of Newton’s three laws. For more general discussion of energy, momentum conservation etc., use classical-mechanics, for Newton’s description of gravity, use newtonian-gravity.

In addition to james large's answer, you can also see the center of gravity as the intersection of all the vertical lines when you hang your solid by any point. (link from http://www.splung.com)
answered Oct 6 '15 by anderstood
What is the physical meaning of the eigenvectors of the mass matrix? If I consider a 2-dof system with one mass linked to two orthogonal springs and I write the equations in any orthogonal system of …
asked Oct 5 '15 by anderstood
I'm breaking your question into parts to identify what confuses you: so $F=kma$ where $k$ is a constant OK until there. They say we choose unit of force such that it produces acceleration of …
Using a "successive impact model" (as if each ball were seperated from the other ones), I produced the following animations: You can see any combination of balls with masses of 1 or 2 (left) or 1 a …
asked Jun 16 '16 by anderstood
Consider a unforced, undamped, linear mechanical system with a finite number of degrees of freedom. Its (second order) dynamical equations can be gathered in a matrix equation $$M\ddot X + K X=0$$ T …
. . . just because I haven't encountered such a phenomenon in everyday life . . . In addition to the existing answers, a common example of the form $x'' + \alpha x=0$ with $\alpha<0$ in physics …
In fluid mechanics, the stress tensor writes $\sigma = -p 1 + \tau$ where the deviatoric part $\tau$ corresponds to shear. The viscous (volumic) forces are $\operatorname{div}\tau$. For a Newtonian f …
The rotation period $T$ is given by $$T=2\pi \sqrt{\dfrac{a^3}{G(M_\text{Sun}+M_\text{planet})}}$$ where $a$ is the sum of the half axes of the ellipse. Routhly: $M_\text{Sun}=2\times 10^{30}$ kg \$ …