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1.3.2 FORCES

Forces can be considered as the action of one body on another or in another way it can interpreted
as a “PUSH” or “PULL” exerted by one body on another. The action of a force in characterized

by three parameters, its magnitude, direction of its action and its point of application. A force is
represented by a known vector.

Figure 1.5: “Push” and “Pull” situation

1.3.3 LENGTH

Length is the measurement or extent of something from end to end. It is needed to locate the

position of a point in space and thereby describe the size of a physical system

1.3.4 TIME

Time is the measure of succession of event and it is a vital parameter in dynamic. Time is not an
important parameter and it not directly involved in the problems associated with STATICS.

1.4 NEWTON’S LAW OF MOTION

Newton's laws of motion are three physical laws that, together, laid the foundation for classical

mechanics. They describe the relationship between a body and the forces acting upon it, and its
motion in response to those forces.

More precisely, the first law defines the force qualitatively, the second law offers a quantitative

measure of the force, and the third asserts that a single isolated force doesn't exist. These three

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