Recent content by Josh The Cool

  1. J

    Undergrad How do you calculate moment of inertia for circle?

    This is in two dimensional space. So I think the z axis if I understand correctly. Edit: I also looked at that wiki page, but couldn't apply it in any useful way.
  2. J

    Undergrad How do you calculate moment of inertia for circle?

    Hey, not sure if this is the right place to post this, but here it goes. how do you calculate the moment of inertia for a circle that is not at its center of gravity. I am trying to find the moment of inertia for a complex shape made of many circles, and this seems like a good place to start...
  3. J

    Undergrad How do you deal with commas in vector equations

    That is what I don't understand, what is a cross product? I'm a computer programmer not a physicist, so thank you for forgiving my lack of knowledge. EDIT: with F = Fx,Fy if I want to find the values of the vectors, like just Fx, how do I do the math? EDIT: After you said the cross product...
  4. J

    Undergrad How do you deal with commas in vector equations

    Hey, So I've been working on a physics project and I'm trying to understand force. This website has all my answers http://www.myphysicslab.com/collision.html but I don't understand with they use commas. For example (Rx, Ry, 0) × (Tx, Ty, 0) = (0, 0, RxTy − RyTx). Now it is dealing with vectors...