Animation illustrating a line integral

• Line integral animation (in Quicktime format)

Visual estimation of line integrals

• constant vector field around the positively-oriented unit circle
• constant vector field along a piecewise linear curve
• nonconstant vector field along the top-half of the positively-oriented unit circle

Another example of a line integral

• nonconstant vector field along the top-half of the positively-oriented unit circle