Track Types 359
When you drag the first vector in a chain of linked vectors, the chain moves as a unit and the vectors remain linked. When you drag a vector further up the chain, it breaks the chain into two smaller chains.
Vector Sum
A Vector Sum track represents the sum of a collection of vectors. Its vector steps are not marked but instead are determined by the components of the vectors in the collection. The green vector sum in Figure 16.33 represents the sum of vector forces A and B. Vector sums are drawn with a dashed line to distinguish them from independent vectors and motion vectors.