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Basics of Statics
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Engineering MechanicsModule 1
Basics of Statics
Force
Force, in mechanics, any action that tends to maintain or alter
the motion of a body.
Its Representation:
Magnitude
Direction
Point of application
Line of action
Classification
Collinear
Concurrent
Parallel
Non-concurrent non parallel
Collinear Force
Collinear forces are forces that have a common line of action,
i.e., the line of action of the forces lie along a single straight
line
, Concurrent Force
If the forces applied to a body are such that their lines of action
meet at a single point, then they are called concurrent forces.
Resultant of multiple forces on a body can be found using triangle
and parallelogram law of vector addition and simplifies the
problem solving by finding the net force on the particle.
Parallel Force
The forces whose lines of action are parallel to each other are
known as parallel forces. They do not meet at one point i.e. Non-
concurrent force. The parallel forces may be broadly classified
into the following two categories depending their direction
There are two types of parallel force
i. LIKE PARALLEL FORCES: The forces whose lines
of action are parallel to each other and all of them
act in the same direction are known as like parallel
forces.
ii. UNLIKE PARALLEL FORCES: The forces whose
lines of actions are parallel to each other and all of
them do not act in the same direction are known as
unlike parallel forces.
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