That means the force on it must be zero.

也就是说它受合力为零。

youdao

In other words zero resultant force is equivalent to no force at all.

换句话说，合力为零就相当于没有任何力的作用。

youdao

In other words zero resultant force is equivalent to no force at all.

换句话说，合力为零就相当于没有任何力的作用。

youdao