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visits member for 3 years, 11 months
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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.


Sep
29
answered How to convert translational energy to rotational energy
Sep
29
answered Newtons laws velocity and acceleration
Sep
28
comment A shorter impulse-contact period than a rod´s mechanical longitudinal wave propagation period may fail to accelerate the rod?
On first contact he elastic wave will force separation but a short time after another contact will happen and so on. So overall there are multiple impact events over a short period of time enough transfer the momentum needed.
Sep
26
comment Transfer function of vibrating string
possible duplicate of Moments of vibrating string
Sep
24
awarded  Autobiographer
Sep
18
comment Two-block system acceleration when applying a force in the $x$ direction
I edited the post for readability with math formatting.
Sep
18
revised Two-block system acceleration when applying a force in the $x$ direction
Math formatting
Sep
18
comment Two Dimensional Kinematics and Projectile motion
The equation $y(t)$ is valid for the ball. There is another equation for the outfielder. Where both intersect is when he catches the ball.
Sep
18
comment Two Dimensional Kinematics and Projectile motion
Explain failed? You have to show your work in this site.
Sep
18
comment Path of wheels of a bicycle
Almost. Not just the back wheel, but both wheels enforce the circular motion through their no side-slip condition. If there is no friction on the front wheel the motion would be linear, as it would be if there was no friction on the back. It is through both conditions that the motion is circular.
Sep
18
comment Path of wheels of a bicycle
slip is lateral (sideways) movement by definition. Not causality but equivalence.
Sep
18
comment Can you punch a hole in an A4 sheet of paper with your hand?
it is not only theoretically possible, it is also empirically possible.
Sep
18
answered Path of wheels of a bicycle
Sep
18
comment Path of wheels of a bicycle
The diagram is wrong. The center of the front wheel is supposed to be along the line of the back wheel.
Sep
18
comment Is it really impossible to calculate in advance the result of throwing dice?
What if you took a snapshot while in the air, and knew exactly the position, orientation, speed and inertial properties. Is it deterministic then, or is the contact with friction chaotic too?
Sep
18
comment Finding the distance between two osclilating particles in a wave
So then the 2nd only.
Sep
17
comment Finding the distance between two osclilating particles in a wave
If you are an ant and want to go from A to B you care about the 1st number. If you have straight ruler you care about the 2nd number. It depends as I said.
Sep
17
revised Finding the distance between two osclilating particles in a wave
added 9 characters in body
Sep
17
answered Finding the distance between two osclilating particles in a wave
Sep
16
comment What happens inside a body when it rotates?
Torque is related to spatial acceleration and not material acceleration. Spatial acceleration is zero for a constantly rotating body.