부산대학교 도서관

A quantitative experiment where we measure the acceleration of spheres of radius "R" rolling on an inclined U-shaped profile of width "2D" is presented. For a given inclination, we examine the behaviour of four solid spheres having different diameters; in contrast to what is usually assumed to be the case, the experimental findings show that the dissipative component of the ball--track interaction can be neglected "only" in a limited range of the "D/R" parameter. We develop two interpretative models which are at the level of advanced high school students. The comparison between model predictions and measurements is quite satisfactory.