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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.


Dec
7
comment Torque on shaft
Consider using math formatting with $...$ for better readability. See help on LaTeX
Dec
7
revised Torque on shaft
Math formatting
Dec
4
comment Force and Torque being applied off-center due to magnetic forces
The equations of motion are valid for any rigid body regardless where the motive forces come from. The fact that magnetic dipoles are involved bears no consequence to the underlying mechanism of motion.
Dec
3
answered Why is sometimes the wave function written as $\exp(i(\omega t-kz))$, so ωt and kz are switched?
Dec
3
revised Why is sometimes the wave function written as $\exp(i(\omega t-kz))$, so ωt and kz are switched?
Math Formatting
Dec
3
comment Introducing angular momentum for the first time to a class
Too bad you can't find a mary-go-round anymore.
Dec
2
revised The Relationship Between Crater Diameter and the Velocity of an Object
added 10 characters in body
Dec
2
comment The Relationship Between Crater Diameter and the Velocity of an Object
hint: See if you can use math formatting in your posts for better readability.
Dec
2
comment Torque and Car parked on slope
I used powerpoint.
Dec
2
answered Torque and Car parked on slope
Dec
2
comment Torque and Car parked on slope
Note that since gravity (and hence weight) goes through the center of mass there is no net torque about that point. And since the car is not moving the net torque due to the reaction forces has to be zero.
Dec
2
comment Torque and Car parked on slope
The first thing you should do is a free body diagram. Then the solution should be right there in front of you. The FBD would lead you to balance of forces in two directions and well as the balance of moments.
Dec
2
comment 2012 quo. no. 14 $F_{net} = ma$
Yeah, we need to know what your question is, not what a teacher or a book asks of for you to do.
Dec
1
comment Most general gyroscope motion
See also related post: physics.stackexchange.com/a/80449/392
Dec
1
comment Most general gyroscope motion
possible duplicate of Describing a motion of gyroscope with gimbal
Dec
1
comment Are the orientations of spin-axes and binary/planetary orbits random or is there any relationship with the Galactic plane?
"Star rotation axis can be misaligned with disk rotation axis". Wow, it is going to take a while for this to sink in.
Dec
1
answered What are the forces acting on a Pendulum Tuned Mass Damper?
Dec
1
comment What are the forces acting on a Pendulum Tuned Mass Damper?
$c$ is actually a rotational damper coefficient and hence the term $c \dot{\theta}$ for torque.
Dec
1
comment What are the forces acting on a Pendulum Tuned Mass Damper?
Wow, that is a convoluted FBD. It combines the inertial forces (due to acceleration of $m$), the tension $T$, the couple $c$ and the damping (due to coefficient $d$). Oh, add gravity in there also.
Dec
1
comment Why is moment of inertia dependent on $r^2$ and not on $r$ ? (physical reason)
Related post physics.stackexchange.com/a/88566/392