H. Chang (collision mechanics)
= H. Chang (collision mechanics)
{c}
<H. Chang (collision mechanics)> helped test a three-parameter model of sphere collisions. The 1994 experiment used pre- and post-impact trajectories to distinguish normal <coefficient of restitution> from sliding <friction> and nonsliding tangential response.<Measurements of the collision properties of small spheres by S. F. Foerster and others>[Abstract and collision model]{ref}