Considering the problem of finding the area under a parametric curve, I thought, y=y(t), x=x(t) A=[inte]ydx=[inte]yx'(t)dt That result seems straighforward. I also thought, what if I let the VVF v=<x(t),y(t)> represent the same curve. To find the area, under the curve (I have in the back of my mind the concept of velocity and position), I would solve the integral, r=[inte]vdt. Should these two results be related? I think they should, but the math shows they aren't. Should the magnitidue of the latter equal the absolute value of the former? Looks like no. Why not?