This document discusses basic concepts in dynamics, including kinematics and kinetics. Kinematics is defined as the study of motion geometry, relating displacement, velocity, and acceleration without considering forces. Kinetics is defined as studying the relationships between forces, mass, and motion, and using forces to predict or determine motion. The document explains that kinematics includes rectilinear motion along a straight line and angular motion along a curved line, and provides examples of rectilinear and angular motion. It concludes by stating that basic equations and units in dynamics will be covered.

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Engineering Mechanics :
DYNAMICS
JJ205
PN NORHAYATI BINTI AHMAD
POLITECHNIC IBRAHIM SULTAN
Faculty of Mechanical Engineering
CHAPTER 5
BASIC CONCEPTS IN DYNAMICS

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OBJECTIVES:
• Explain the importance of dynamics in
engineering
• Explain general aspects of dynamics
• Describe fundamental units and basic definitions
in dynamics
• Describe the relationship between linear and
angular velocity, linear and angular acceleration
• Use the uniform acceleration formula for the
linear and angular motion

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Introduction
• Dynamics includes:
Kinematics: study of the geometry of motion.
Kinematics is used to relate displacement,
velocity, acceleration, and time without reference
to the cause of motion.
Kinetics: study of the relations existing
between the forces acting on a body, the mass
of the body, and the motion of the body.
Kinetics is used to predict the motion caused
by given forces or to determine the forces
required to produce a given motion.

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Kinematics
Rectilinear motion
position, velocity, and
acceleration of a particle
as it moves along a
straight line.
Angular motion
position, velocity, and
acceleration
of a particle
as it moves along
a curved line in two or
three dimensions

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Rectilinear motion
Moving in a negative
direction from the origin
Moving in a positive
direction from the origin

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Angular motion

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Basic Equation/ Units in Dynamics

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