Cho lực F ⃗=6x^3 i ⃗-4yj ⃗ tác dụng lên vật làm vật chuyển động từ A(-2,5) đến B(4,7). Vậy công của lực là:

The work done by along the given path C from A to B is given by the line integral,

I assume the path itself is a line segment, which can be parameterized by

with 0 ≤ t ≤ 1. Then the work performed by F along C is

iron would move it is magnetic there is a mag field around the current in the wire

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