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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
25
comment Relative angular velocity and acceleration
Do you have a link or other reference.
Mar
24
comment Free fall from space
possible duplicate of Time taken for object in space to fall to earth
Mar
24
answered Eulerian Angles — Why three rotations can transform fixed frame into body frame?
Mar
24
comment Eulerian Angles — Why three rotations can transform fixed frame into body frame?
There are three degrees of freedom rotationally needed to achieve any orientation possible.
Mar
24
answered Why is centrifugal 'force' perpendicular to line of inertia
Mar
24
awarded  Nice Answer
Mar
23
comment Why is it easier to break a tightened or stretched string than a loose one?
The tension keeps the string horizontal and perpendicular to the scissors blade motion. Without tension the string turns 90° and becomes parallel to the blade motion.
Mar
23
comment A sphere rolling down a rough wedge which lying on a smooth surface
Show us what have you done.
Mar
23
answered Why is it easier to break a tightened or stretched string than a loose one?
Mar
22
awarded  homework
Mar
21
comment Having trouble with a homework problem involving rotation
Hint: have you used the 14kg block in your equations?
Mar
20
comment Smallest possible object made of atoms that is spherical to a given degree
Nothing is actually perfectly round you know.
Mar
20
comment Can I make a rod in the vertical plane move with its one end on the ground in a slanting position?
Maybe you are right...
Mar
20
awarded  Popular Question
Mar
20
comment Animating an Acceleration Vector - Acceleration of object on a crested path in gravitational field
See related answer on how to decompose accelerations along a path: physics.stackexchange.com/a/104256/392
Mar
20
comment Rigid body collision, 3 circles in contact
See here and here on how to model such systems.
Mar
20
comment Rigid body collision, 3 circles in contact
The solution is quite complex as your need to build a system of equations to find all the contact impulses when happening simultaneously.
Mar
19
answered Acceleration vector for an object moving in a elliptic trajectory
Mar
19
comment Why do the planets orbit the Sun?
As I told my 8 year old, they not so much orbit as fall. Just that they keep missing the sun because of how fast they are moving. And they keep falling and missing, falling and missing, ... for billions of years.
Mar
18
comment How do we know that $F = ma$, not $F = k \cdot ma$
What you are really asking is about equality (parity) between masses. See physics.stackexchange.com/q/8610/392