3. Basic ideas
Notice that if we think of having a single link arm where the point A2 has a device attached which can do work exactly at A2, then the only points where work can be accomplished are the points of the circle centered at A1. Not surprisingly, if we are interested in the points that are reachable by adjusting the angles between the links of a linkage, we need more than one link to be able to reach more than a very restricted collection of points.
Welcome to the
These web essays are designed for those who have already discovered the joys of mathematics as well as for those who may be uncomfortable with mathematics.
Search Feature Column
Feature Column at a glance