9,435 reputation
21743
bio website
location United States
age
visits member for 4 years, 2 months
seen 18 hours ago

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.


21h
comment Boiled egg vs raw egg moment of inertia
Due to viscus forces the fluid will rotate with the shell if the motion is steady state. The density might be different though as well as the mass distribution.
21h
comment Men on the pully palte to lift
Also is recommended to use math notation for readabilty. See physics.stackexchange.com/help/notation
22h
comment Stretch length of horizontal and vertical springs
This picture is misleading. The spring on the left is equivalent to a spring with double the length on the right. This is seen if you treat the fixed wall on the left as a mirror.
22h
comment classical-mechanics
Huh, what, who? physics.stackexchange.com/help/how-to-ask
1d
answered What is a reasonably accurate but simple model of the Milky Way's gravitational field?
1d
comment What is a reasonably accurate but simple model of the Milky Way's gravitational field?
Relavent link: astro.cornell.edu/academics/courses/astro201/rotation_flat.htm It states that mass is proportional to distance.
2d
comment Calculating the flex of a solid bar under force
The two common types of supports are called: simply supported beam and cantelever beam. Those are the correct terms.
2d
comment Calculating the flex of a solid bar under force
This would be better received with some math formatting. See physics.stackexchange.com/help/notation
2d
answered Calculating the flex of a solid bar under force
2d
revised will frictional force work against the vertical direction of velocity of an object?
edited tags
Jan
23
comment Finding the effective force constant in an accelerating frame
I think this is a valid question and should remain open. It demonstrates the confusion between the response of steady state loads (accelerations) and oscillating loads (accelerations). I am nominating it to re-open.
Jan
22
comment Finding the effective force constant in an accelerating frame
You have it. If the effective spring rate is $k_1+k_2$ then the vibration frequency is $$\omega^2 = \frac{k_1+k_2}{m}$$. Keep it simple! Remember, any static load (including inertial loading) does not affect the vibration.
Jan
21
comment How to measure the size of a laser dot?
Lay a ruler next to the laser or something else of known size for calibration.
Jan
21
comment How to measure the size of a laser dot?
You can take a picture and count pixels.
Jan
21
answered Why do these standing waves appear to be traveling?
Jan
21
answered Fluids in a U-shaped Tube
Jan
21
answered What is the equation of motion for a driven spring?
Jan
19
awarded  Fanatic
Jan
18
comment Is it possible to determine the outcome of any impact knowing only the ratio of masses?
What software did you use for the curves?
Jan
18
comment Coefficients of Friction in Equilibrium Ladder Problems
There is either motion or not. Only when both reach maximum motion can occur.