Lecture 1: Course Outline and
General Definitions
Dr. Mahmoud Atef
Course Outline
Instructor Dr. Mahmoud Mohamed Atef
Mechanical design and production department, Assuit university
E-mail: matef@aun.edu.eg
Office hours:
Lectures Monday from 09:00 am to 11:00 am
Tutorials: Group 1: Monday from 11:00 am to 12:00 pm
Group 2: Monday from 12:00 pm to 1:00 pm
Group 3: Monday from 01:00 pm to 02:00 pm
Reference Kinematics and Dynamics of Machines, George H. Martin.
Waveland Press Inc. 2nd edition 1982
Course Outline
Practical Evaluation
Midterm 20 To Be announced during lectures
(mid of November)
Quizzes 10 To Be announced during tutorials
Attendance and 20
To Be announced
projects
Final exam 50 To be determined by the Faculty
during January 2024
Course Objectives
• The main objective of the course is to understand
fundamental principles for kinematic and kinetic
analysis of mechanisms and machines.
• By the end of this course, the student will be able to
perform kinematic and dynamic analyses of linkages
and machines, which is a principal step in the design
process.
Course Topics
• Simple mechanisms
• Kinematics in mechanisms (relative motion: graphical solution)
• Kinematic analysis in mechanisms (vector loop method)
• Kinetics of a rigid body
• Kinetics in mechanisms: static and inertia force analysis (analytical solution)
• Kinetics in mechanisms: static and inertia force analysis (graphical solution)
• Gear and gear trains
Introduction
What is Mechanics?
Mechanics is a branch of physics that is concerned with the
state of rest or motion of bodies that are subjected to the
action of forces.
Introduction
What are the divisions of Mechanics?
Mechanics
Classical or Newtonian Relativistic Quantum
For bodies with visible For bodies moving with For very small bodies
size and speeds less than speeds higher than the (the atomic or subatomic
the speed of light speed of light scales)
Introduction
What is Engineering Mechanics?
• Engineering Mechanics is the branch of applied mechanics that
deals with the analysis of forces and the resulting motion or
deformation in engineering systems.
• It applies principles of mechanics, to solve practical problems
related to structures, machines, and materials.
• The goal is to design safe, efficient, and durable systems, using
knowledge of forces, energy, and motion
Introduction
What are the divisions of engineering Mechanics?
Engineering Mechanics
Mechanics of solid Mechanics of fluid
Mechanics of Mechanics of
Rigid body deformable body
Statics Dynamics Theory of Theory of
Kinematics Kinetics elasticity plasticity
Introduction
Basic quantities
• length: describes the size, displacement, or distance
between points in space.
• Time: is involved in measuring the duration of motion
• Mass: measures the amount of matter in a body
• Force: is the push or pull acting on an object. It's a
vector quantity that can cause changes in motion or shape.
Laws of Mechanics
Newton’s first law
• An object at rest will remain at rest, and an object in motion will
continue in motion with a constant velocity unless acted upon by an
external force.
Laws of Mechanics
Newton’s second law
• The time rate of change of the
momentum of a body is equal in both
magnitude and direction to the force
imposed on it.
Laws of Mechanics
Newton’s third law
• Whenever one body exerts a force on
a second body, the first body
experiences a force that is equal in
magnitude and opposite in direction
to the force that it exerts.
Laws of Mechanics
Lama's Theorem
• When three forces acting at a point
are in equilibrium, then each force is
proportional to the sine of the angle
between the other two forces
Laws of Mechanics
Parallelogram Law
• If two forces acting simultaneously on a
body at a point are presented in magnitude
and direction by the two adjacent sides of a
parallelogram, their resultant is represented
in magnitude and direction by the diagonal
of the parallelogram which passes through
the point of intersection of the two sides
representing the forces.
Laws of Mechanics
Trangle Law
• If two forces acting simultaneously on a
body at a point are represented as two
sides of the triangle with the order of
magnitude and direction, then the third
side represents the magnitude and
direction of the resultant force.
Laws of Mechanics
Principle of Transmissibility
• The state of rest or motion of a rigid
body is not affected if a force acting
on the body is replaced by another
force of the same magnitude and
direction but applied at a different
point along its line of action.
