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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.


Mar
20
answered Find force of friction on an object under influence of tension by another object
Mar
20
revised Free body diagram of this system and equation
added 78 characters in body
Mar
19
revised Maximum acceleration for a vehicle
added 133 characters in body
Mar
19
answered Maximum acceleration for a vehicle
Mar
19
answered Derive Equation For a Cantilever in SHM
Mar
19
comment Derive Equation For a Cantilever in SHM
Can you provide a sketch that indicates the supports and the direction of vibration (side to side, or up and down).
Mar
19
comment Derive Equation For a Cantilever in SHM
Did you look up beam vibrations?
Mar
19
comment Collision of two satellites
Typo "there" $\ne$ "their"
Mar
19
awarded  Revival
Mar
19
comment Elastic collision of point particle and rod
@linus there are easier ways to tackle this problem (using energy and momentum), and so my goal was to shed some light into what happens really (momentum exchange). Physics is not competitive, but collaborative. I am ok with not being awarded a question, or not getting a lot of votes. As you benefited from this post other will in the future too and that is enough.
Mar
18
comment Does precession of a rigid body change instantaneously?
How do you start to apply a constant torque without a torque ramp-up phase?
Mar
18
comment The momentum of a swinging sword
I thought the primary role of the pommel was so the sword doesn't fly out of your hands when you swing fast (since it wants to move in a line). In fact the centripetal force must be transmitted through the pommel mostly.
Mar
18
comment The momentum of a swinging sword
Isn't the wrist held tight during the swing and the elbows and shoulders flexing? So a properly balanced sword should consider this. The rule is the further the pivot from the center of mass is the closer the CoP is to the center of mass. The relationship is $c=\frac{\rho^2}{\ell}$ where $c$ is CM to CoP, $\ell$ is CM to pivot and $\rho=\sqrt{I/m}$ is the radius of gyration of the sword about the CM.
Mar
18
comment The momentum of a swinging sword
There are several CoP operating here. There is a CoP for swinging at the wrist, a CoP for swining at the elbows, a CoP for swinging at the shoulders and a CoP for swinging at the waist. Depending on the style of hitting you pick the joint making the most power to minimize impulse reactions.
Mar
18
comment The momentum of a swinging sword
Wikipedia is misspelled as "Wihipedia" above.
Mar
18
comment Elastic collision of point particle and rod
Being a homework type problem I wanted to just hint that the direction to go with this. My contribution is how to take a complicated problem (rod+mass) and turn in into a simpler one (two masses).
Mar
17
answered Determining flexural modulus by performing 3 point bending test using hollow cylindrical tube
Mar
17
comment Determining flexural modulus by performing 3 point bending test using hollow cylindrical tube
Please try to use math formatting with $...$. It helps greatly with readability.
Mar
17
comment Determining flexural modulus by performing 3 point bending test using hollow cylindrical tube
It is not mass moment of inertia, but area moment you are talking about, right?
Mar
17
answered Tensor of inertia