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Started programming on a ZX spectrum in the 80's and have moved through Assembly, Turbo Pascal, C++, C#, Fortran. My main area of focus is engineering and scientific computing like numerical methods and 3D graphics.


Jul
14
comment Stresses on an inclined plane
Usually the force stress relationships only apply to infinitesimally small volumes of materials. In any case, the balance of forces is what drives these relationships and here your question is more about geometry than about mechanics.
Jul
13
answered Calculate vertical distance using acceleration
Jul
13
comment Calculate vertical distance using acceleration
If you time intervals are in $\rm seconds$ then the integrals are $\rm meter/second$ and $\rm meter$.
Jul
12
comment What is the optimal weight for a golf ball?
It is not a matter of equal force, but of equal hitting energy transfer.
Jul
12
comment How can a gas support tensile stresses?
I guess if you apply equal pressures on all sides of a cube there is going to be a change in volume only and no change in shape. There will be no "flow", just an overall scaling.
Jul
12
comment How can a gas support tensile stresses?
A fluid can only support the bulk modulus $${\rm d}V = -K V {\rm d} P$$
Jul
11
answered Elastic collision of point particle and rod
Jul
11
comment Elastic collision of point particle and rod
How should the frequency value be used here I wonder. Do we need to consider the elasticity of the rod (bending) also? Do we know if the other end of the rod is free or clamped? Is frequency an obscure way of describing rotational velocity here?
Jul
10
comment Flying eggshells
You know way too much about eggs :-)
Jul
10
comment Flying eggshells
What if you hollow it out, seal it on a hot day and wait for the dense cool air at night to elevate it like a balloon. I still don't think there would be enough density difference to overcome the weight of the shell.
Jul
10
comment Does a simple double pendulum have transients?
Is the solution of the double pendulum ultimately a periodic function or not? Is it guaranteed to have the exact same state as the initial conditions at a time >0 ? Once this is answered any characterization of the solution as transient + eigenmodes can be done.
Jul
10
comment What is the scientific reason for the inclination of earth's rotation axis?
Has there been a simulation out there showing how planets colliding might affect the tilt?
Jul
10
comment Deformation of the cylinder
The center should not have slope to it, and with free inside the inside lip can curl down. An infinitesimal connection in the middle is a better idealization.
Jul
10
answered Deformation of the cylinder
Jul
9
answered Is it possible to prove that projectiles with drag will not travel in a parabola under the theory of classical mechanics?
Jul
9
comment How effective is speeding?
BTW Speed limits have nothing to do with safety as driving in Europe indicates.
Jul
9
comment How effective is speeding?
Do you regularly drive on a flat, straight empty road? The real life is some many more times more complex than you can write down with a few simple equations.
Jul
8
comment Converting Point Gradients to Rotational Representation
Cool problem... I was going to suggest using screw theory, but you found the answer already.
Jul
8
comment Calculate Euler equations of fluid dynamics without division?
Can you do deferred division, it terms of keeping an numerator and denominator separately?
Jul
8
comment Solving for motion of rotating rod using only Newton's laws?
Newton's Laws only apply to point masses. You need Euler's laws of rotation rigid body motion. If the space is 2D or 3D it does not matter really.