In physics, a quantity that produces a change in the size or shape
(see Strength Of Materials)
or the Motion of a body. Commonly experienced
as a push or pull, force is a
Vector quantity, having both magnitude and direction. Four basic types of force are
known in nature. The gravitational force (see Gravitation) and the electromagnetic force (see Electricity; Magnetism) both have an infinite range. The <
A HREF="../s/strong_interaction.htm">Strong Interaction is a short-range force holding the atomic nucleus together, and the Weak Interaction is a short-range force associated with Radioactivity and particle decay. In the Metric System forces are measured in such units as the dyne (cgs system) and the Newton (meter-kilogram-Second
system), which cause accelerations of, 1 cm/sec2 on a 1-gram Mass and 1 m/sec2 on a 1-kg mass. In English Units of Measurement the Pound is used
. A 1-lb force equals 444,823 dynes; 1 dyne equals 10-5 newtons.