The document provides an overview of engineering mechanics, a branch of applied science focused on the behavior of bodies in motion or at rest and applying mechanical principles to solve engineering problems. Key terms such as mass, weight, velocity, speed, acceleration, momentum, rigid bodies, scalar and vector quantities, and forces are defined. The content includes explanations of how these concepts relate to the analysis of forces and motion in engineering contexts.

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2. What is Engineering Mechanics?
•It is a branch of Applied Science,
which deals with the behavior of a
body when the body is at rest or in
motion, it also involves the
application of the principles of
mechanics to solve real-time
engineering problems.

3. Engineering Mechanics
Mechanics of rigid body Mechanics of deformable body Mechanics of fluid
Statics Dynamics
Kinetics Kinematics
Strength of Material

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5. Important terms of Engineering Mechanics-
• Mass- Mass is both a property of a physical body and
a measure of its resistance to acceleration.
• Weight-a body's relative mass or the quantity of
matter contained by it.
• Length- Length is a measure of distance.
• Distance and Displacement- Distance is a scalar
quantity that refers to "how much ground an object
has covered" during its motion. Displacement is a
vector quantity that refers to "how far out of place an
object is"; it is the object's overall change in position.

6. • Velocity-Rate of change of displacement
with respect to time. It is a vector quantity.
• Speed--Rate of change of distance with
respect to time. It is a scalar quantity.
• Acceleration-acceleration is the rate of
change of velocity of an object with respect
to time.
• Momentum-It is the product of
the mass and velocity of an object. It is
a vector quantity. Mathematically, p=mv

7. • Particle-A infinitely small thing or body is
called particle with respect to other one . For
example we can say earth is a particle with
respect to the universe.
• Rigid body- rigid body is a solid body in
which deformation is zero or negligible, in
simple we can also call that
the distance between any two given points on
a rigid body remains constant in time
regardless of external forces exerted on it.

8. 1. Scalar and Vector quantity-A scalar
quantity is a one dimensional
measurement of a quantity, like
temperature, or mass. A vector has more
than one number associated with it. A
simple example is velocity. It has a
magnitude, called speed, as well as a
direction, like North or Southwest or 10
degrees west of North.

9. Force-Force can be defined as a push or a pull that changes or tends to
change the state of rest or uniform motion of an object or changes the
direction or shape of an object.
•System of force-A force system is a collection of forces acting at
specified locations (may also include couples). Thus the set
of forces shown on any free body diagram make up a force
system. Force system is simply a term used to describe a group
of forces.

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