Recent content by Isawyou0

so there is second moment of inertia and moment of inertia I didn't knew that :/ of course I'm talking about second moment of inertia in 3d, for different shapes...

the moment of inertia in 3d is it the same for 2d?

Hi! is there anyway to calculate inertia in 3d? for all forms, like we do in 2d, is it the same? https://upload.wikimedia.org/math/d/d/3/dd3b5877d05c86142f03703ac1c6562b.png

isn't it like: v=w*r.perpendicular();

yes, yes, means that v=wr gives v in one dimension, right! I want to calculate relative velocity, v1 = v + wr - ( v' + w'r' ) ; since that v is in 2d(v for x and y in euclidean space, as a vector velocity);

Hi! seems crazy! but what if there is vx and vy?r is it a vector? w*r can be a cross product?

Hi all! How can we know the time and speed of the object before it reachs the terminal veocity, it will reach that, but when? (he's acceleration decreseases right) thanx

Since that inertia is in kg.m^2, how to convert it to pixel(best way)? my rotation still going on the wrong sens

it's ok for rotation, teta = teta + (-1 * (1 + 1) * ((ix + teta * (centx - ja) - ibx) * xx1 + (iy + teta * (centy - jb) - iby) * yy1)) / (1 / 1.0f + 1 / 2.0f + ((float)Math.Pow((centx - ja) * xx1 + (centy - jb) * yy1, 2) / In) + ((float)Math.Pow((centbx - ja) * xx1 + (centby - jb) * yy1, 2) /...

it works finally! just want to know about rotation last n, w'=w+j/i*r*n; n magnitude?

vx = vx + ((-1 * (1 + 1) * ((vx + teta *r) * nx+ (vy + teta * r) * ny)) / ((1 / m1+ 1 / m2) * ((ny* ny) + (nx* nx)))) * nx; vy = vy + ((-1 * (1 + 1) * ((ix + teta * r) * nx+ vy + teta * r) * ny)) / ((1 / m1+ 1 / m2) * ((ny* ny) + (nx* nx)))) * ny; nx &&ny: are normal of collison. this code...

okay! it will be more complicated, just want to know how to clculate ellastic colision, and rotation

Hi all! I'm developping a program, I wish if somebody helps me since I'm not good in physics, we know that: v'1=v1-(j / m1)*n v'1=v2+(j / m2)*n 1) when we use negative and positive sign? if we change them, there is error sometimes. 2)In 2d, do I have to calculate vx, and vy separately, what...