Wednesday, February 18, 2004

Earth, Force

This is a vector quantity that changes or tends to produce a change in the motion of a body. It is a push or pull and must be specified as to its direction and magnitude. If there is no acceleration of a body, the forces that act on it are balanced. There are four types: compression, tension (or extension), shear, and torsion. During compression, rocks are squeezed together by two


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