The work, flow, and flux of a vector field relative to a curve can be calculated with a line integral. The curve is $r$ the vector field is $F$ . The red tangent vectors, showing the direction of $dr$, are used to calculate the work or flow, while the green normal vectors, showing the direction of $vec n$ $ds$ are used to calculate the flux.

아래 빈칸에 Sage 코드를 넣고 실행하세요. (Type some Sage code below and press Evaluate.)