If there's more than one force in this direction, you have to add these forces in this direction vectorially, and then this is the work that the forces do together.

如果不止一个力，在这个方向，你必须加上其他力，在这个方向的矢量，功就是，这些力所做的总和。

youdao

If there's more than one force in this direction, you have to add these forces in this direction vectorially, and then this is the work that the forces do together.

如果不止一个力，在这个方向，你必须加上其他力，在这个方向的矢量，功就是，这些力所做的总和。

youdao