Dynamics Introduction

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    • Mechanics is a branch of the physical sciences that is concerned with the state of rest or motion of bodies subjected to the action of forces
    • Statics is concerned with the equilibrium of a body that is either at rest or moves with constant velocity
    • Dynamics which deals with the accelerated motion of a body
    • Galileo Galilei contributed pendulums and falling bodies in Dynamics
    • Isaac Newton contributed the three fundamental laws of motion
    • Kinematics, which treats only the geometric aspect of the motion
    • Kinetics, which is the analysis of the forces causing the motion
    • Particle denotes an object of point size.
    • Body denotes a system of particles which form an object of appreciable size
    • The term particle is used to mean an object whose dimensions are negligible compared with the size of its path
    • Rectilinear Kinematics refers to straight line motion
    • Position coordinate is used to specify the location of the particle at any given instant.
    • Position is a vector quantity since it has both magnitude and direction
    • Displacement of the particle is defined as the change in its position
    • average speed is always a positive scalar and is defined as the total distance travel by a particle divided by the elapsed time
    • The magnitude of velocity is known as the speed
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