## flumech2 Are velocity components Vr=5rcos(theta), Vtheta = -5rsin(theta) irrotational? one year ago one year ago

If you convert to rectangular coordinates, $$\large v_x=5r=5\sqrt{x^2+y^2}$$ $$\large v_y=0$$ Then $$\large \partial v_x/\partial y \neq \partial v_y/\partial x$$ so this velocity is not irrotational.