ENGINEERING MECHANICS - a branch of science
that deals with the behavior of a rigid body when
the body is at rest or in motion
RIGID BODY - a body that does not deform under
load
- the distance between any 2 points on a rigid body
remains constant regardless of external forces
exerted on it
TYPES OF ENGINEERING MECHANICS
1. STATICS - The study of external forces on a rigid
body when it is at rest and remains at rest before
and after the application of forces
2. DYNAMICS - deals with the study of external
forces applied on a body inducing any motion
2. FORCE - THE CAUSE OF CHANGE IN THE
STATE OF MOTION OF A BODY. A VECTOR
QUANTITY F = m.a
Newton (N) – unit of Force
Force (N) = mass (kg) x acceleration (m/s2)
Weight (N) = Mass (kg) x Agravity (m/s2)
SCALAR - a quantity that only has a magnitude
VECTOR - a quantity that has both magnitude and
direction
LOAD - the measurement of the external forces
applied to bodies
TYPES OF LOAD:
1. POINT LOAD - concentratedly imposed at a
point
2.UNIFORM LOAD -series of concentrated loads
with uniform magnitude
3. VARYING LINE LOAD - series of concentrated
loads with varying magnitude
FORCE SYSTEMS
1. PARALLEL FORCES - forces acting in the same
direction but do not converge at a common point
2. COPLANAR FORCES - forces acting on single
plane
concurrent
3. CONCURRENT FORCES - forces converging at
a common point
COMPONENTS OF A FORCE - represents the
combined vertical & horizontal forces that
combine to make the resultant force
RESULTANT FORCE - representative force of the
cumulative effects of forces
REACTION - reactive force developed by a body
on which a force acts
MOMENT - rotation of a force at a point or an axis
FREE-BODY DIAGRAM - isolated view of a body
where all considered forces are shown
