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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.


May
5
comment Infinite series of derivatives of position when starting from rest
Some higher order derivative is going to be non continuous, and a step function.
May
5
comment Force applied to wheel in pure rolling motion at contact point with road
a) It is very hard to apply a pure torque, and b) there is no friction unless there is normal force though the contact.
May
5
answered The choice of pivot point in non-equilibrium scenarios
May
3
answered Geometry in diagonal matrix and inertia tensor
May
2
comment Transfer Equation between two oscillating pendulum collision
Possible duplicate or related - physics.stackexchange.com/q/78894/392
May
2
answered Why does shape of elements matter in finite elements analysis?
May
2
comment Correct terminology for combined kinematic and dynamic state
The kinematic state has no description for forces. It is simply a relationship of positions and orientations and their derivatives. Dynamic state involves solving for all the forces in the system.
May
1
comment Vibration transmission using spring and damper model
What you want as I said is a transient simulation (not static) with some kind of contact model.
Apr
30
comment Why and how will the string break?
You cannot pull on the end of an infinite series of strings. There is no end all the points are in the middle.
Apr
30
answered Mechanics question - ladder leaning against a wall
Apr
30
comment Do photons occupy space?
+1 good question. Can the uncertainty principle be applied to show that a photon's wave function is going to have a non-zero spatial dimension? Maybe it is infinite, meaning the photon occupies the entire space along the ray of light at the same time.
Apr
30
answered Correct terminology for combined kinematic and dynamic state
Apr
30
comment Doing a spring experiment, and need to find the stretch required
You have two equations. Distance $x$ and distance $y$ and you have two uknowns, $v$ and $t$.
Apr
30
revised Doing a spring experiment, and need to find the stretch required
added 2 characters in body
Apr
30
comment Doing a spring experiment, and need to find the stretch required
Projectile motion.
Apr
30
answered Doing a spring experiment, and need to find the stretch required
Apr
28
answered Vibration transmission using spring and damper model
Apr
28
comment Vibration transmission using spring and damper model
It is unclear what you mean by transmitting vibrations. During the contact displacements are constrained between the two parts, with unknown contact force, and outside of contact area displacements are unknown, but the applied force is specified zero.
Apr
28
comment What cools off faster a square or a disc?
Also, do you mean conductive, convective or radiative cooling?
Apr
28
comment What cools off faster a square or a disc?
Inches is not a unit of area.