Recent content by Mattew

  1. M

    Velocity vectors in three dimensions

    Thanks, I was looking for a way to do it without introduncing x,y,z at all. I actually need to express it in a proof by means of the spherical angles and magnitude, but I need no computations...only the relative velocity as a function of the original spherical angles of v1 and v2 (let's immagine...
  2. M

    Velocity vectors in three dimensions

    Let me see if I get it: in this coordinate system the location of a point p in the sphere is defined by a triple (r,teta,phi), where r is the distance of the point from the origin, teta is the angle between the vector connecting p to the origin and the z-axis, and phi is the angle between the...
  3. M

    Velocity vectors in three dimensions

    Hi everybody, I have a quite simple question (in my opinion) but my background is quite poor about three dimensions physics. I need to express two velocity vectors, v1 and v2, in three dimensions polar coordinates, which means using polar and azimuthal angles. The two polar angles represent...
  4. M

    Solid angles and position vectors

    To explain you you why I'll start from beginning: I have a 2D framework representing a Boolean Model distributed class of sensors and a a moving target, in which sensors choose their directions following a uniform distribution in [0,2pi] and so the target does...this means that we can compute...
  5. M

    Solid angles and position vectors

    Well, that's mainly what I'm concerned about: if if you think about it geometrically, the spherical space around p (the origin of our coordinate system) is divided into cones with vertex in P, with the solid angle of the cone determining a direction, then passing to the limit (-> infinity) you...
  6. M

    Solid angles and position vectors

    I've already posted this question in the math section, but since I got no reply I'll try it here (sorry for the cross-posting). I'm using solid angles to define directions of objects moving from the centre of the sphere towards all points in the space around, which means I divides the (4pi)...
Back
Top