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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. #SOreadytohelp


Aug
19
comment Calculate torque to rotate and 84lb panel vertically from 0 - 90 degrees
If $c=\ell/2$ then $I+m c^2 = \frac{m}{12}\ell^2 + m c^2 = \frac{m \ell^2}{3}$
Aug
18
answered Calculate torque to rotate and 84lb panel vertically from 0 - 90 degrees
Aug
18
comment Calculate torque to rotate and 84lb panel vertically from 0 - 90 degrees
Also is the panel going to be moving slowly, or really fast? Is the rotational acceleration of the panel important here or not?
Aug
18
comment Calculate torque to rotate and 84lb panel vertically from 0 - 90 degrees
What is important is the distance between the pivot axis and the center of mass. Please specify.
Aug
18
comment Transfer of angular momentum during oblique impact with(out) adhesion
See homes.cs.washington.edu/~todorov/courses/amath533/Stewart00.pdf
Aug
18
revised Does a body always rotate purely about its center of mass?
added 267 characters in body
Aug
18
answered Does a body always rotate purely about its center of mass?
Aug
18
comment Does a body always rotate purely about its center of mass?
Is this physics.stackexchange.com/a/102150/392 describes the situation, or are you talking in general?
Aug
18
comment Does a body always rotate purely about its center of mass?
The answer is not. If net forces are zero then the only motion possible is for the center of mass to move on straight line. Is the bottom of the rod in contact still, or is it in free fall?
Aug
18
comment Does a body always rotate purely about its center of mass?
possible duplicate of Do objects rotate around the torque vector or its center?
Aug
18
comment Does a body always rotate purely about its center of mass?
Related: physics.stackexchange.com/a/199709/392
Aug
17
answered How can we find velocity, acceleration etc, of a revolving particle with respect to an observer inside the circle(not at center)
Aug
17
comment Do photons experience every moment in time and position in space simultaneously?
Sure they do, in some sense. They interact with stuff via processes witch may or may not take time. Time is a factor in the propagation of light as well as the interactions of photons.
Aug
17
answered Why isn't angular velocity the moment of velocity if angular momentum is moment of momentum?
Aug
17
answered Car Crash Scenario
Aug
14
comment Can Gravitational force between two bodies always produce motion?
They won't necessarily meet if the are separating with escape velocity or more.
Aug
13
reviewed Approve Cinema and TV pictures
Aug
13
comment Cinema and TV pictures
Did you google how a TV works?
Aug
13
answered Pulley system: how can tensions be equal throughout a entire rope if the weights on opposite ends are different?
Aug
13
revised Is it true that light has a lot of energy but cannot exert force
added 10 characters in body