Recent content by Wardub

  1. W

    Undergrad Time derivative of rotating vector

    Thanks, I actually just got it myself by drawing a picture and using the Pythagorean theorem. Essentially equivalent to what you did.
  2. W

    Undergrad Time derivative of rotating vector

    Trying to teach myself physics and I've run into a problem I don't quite understand. "The magnitude of dA/dt can be found by the following geometrical argument. The change of A in the time interval t to Δt is" ΔA = A(t + Δt) - A(t) And then somehow it gets to |ΔA| =...