They can be broadly grouped into two categories: those that use the meter, kilogram, and second as base units (MKS systems), and those that use the centimeter, gram, and second as base units (CGS syst...They can be broadly grouped into two categories: those that use the meter, kilogram, and second as base units (MKS systems), and those that use the centimeter, gram, and second as base units (CGS systems). We will mostly use SI units in this course, but we will use other systems from time to time so that you get some experience with using them. government attempted to switch the United States to the metric system, but the idea was abandoned after strong public opposition.
