Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cycloids. (a) The curved shape that is formed by attaching eight sine weighted lines (Figure 29c) of equal length to each other resembles a cycloid. If increasingly more and shorter lines were used, the shape would be indistinguishable from the cycloid in (b), which is the curve formed by a point (red) on the perimeter of a rolling circle (gray) [Color figure can be viewed at wileyonlinelibrary.com]
