Quiz

Ideally, if there is no friction or resistance to movement, it will not come to a standstill. The same applies even to a polyhedron. In principle, if you release a cylinder whose center of gravity is shifted and not located on the axis, then in the absence of friction and resistance to movement, it will continue to roll back and forth. The same applies to, for example, a polyhedron that is "almost a cylinder." Of course, energy will be expended when lifting the almost cylinder onto an edge, but it will also be released when the almost cylinder is lowered onto a face.