Stephen M. Birn and Bela I. Sandor

There are two major categories in dynamics, kinematics and kinetics.
Kinematics involves the time- and geometry-dependent motion of a particle,
rigid body, deformable body, or a ?uid without considering the forces that
cause the motion. It relates position, velocity, acceleration, and time. Kinetics
combines the concepts of kinematics and the forces that cause the motion.

Kinematics of Particles
Scalar Method

The scalar method of particle kinematics is adequate for one-dimensional
analysis. A particle is a body whose dimensions can be neglected
(in some analyses, very large bodies are considered particles).
The equations described here are easily adapted and applied to two and
three dimensions.
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General plane motion of a rigid body is de?ned by simultaneous
translation and rotation in a plane. Figure 1.3.11 illustrates how the velocity
of a point A can be determined using Equation 1.3.46, which is based on
relative motion of particles.

FIGURE 1.3.11 Analysis of velocities in general plane motion.
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