
307Accident Reconstruction
Combined Linear and Rotational Momentum
Linear and rotational momentum may be combined in those reconstructions that combine
both eects in the pre or post phases of the collision. Each section of the collision may be
solved piecewise and then the two solutions may be then combined through superposition.
Such solutions can be quite complex and can involve translation and rotation of the axes.
In these types of reconstructions two sets of coordinates may need to be established to nd
the complete solution. For example, the linear momentum portion of the solution may uti-
lize rectangular coordinates while the rotational ...