The International System
of Units, abbreviated SI, is accepted in the United States and throughout the
world, and is modern version of metric system. By international agreement, SI
units will in time replace other systems. In SI, the kilogram (kg) for mass,
meter (m) for length, and second (s) for time are selected as the base units,
and the unit Newton (N) for force is derived from the preceding three
by F = ma. Thus force (N) = mass (Kg) × acceleration (ms-2) or
N
= kg. ms-2
Thus, 1 newton is the
force reqiured to give a mass of 1 kilogram an acceleration of 1 meter per
second per second.
