ENGINEERING MECHANICS

PARTICLE

                       It is a body of infinite small dimensions may be considered as a point only having the existence

                       For the shake of analysis, a body may be considered as a particle.

RIGID BODY

                       This is define as the body having no deformation or do not change it’s shape and size ,called rigid body

                       In practical , no body is perfectly rigid body , but for the shake of analysis we can take a body as rigid body.

DEFORMABLE BODY

                       This is define as the body having no deformation or changes it’s shape and size under the action of forces called deformable body.

                       In practical , all the bodies in this universe are deformable body.

ENGINEERING MECHANICS

                       It is the branch of science which most deals with the forces acting on a body or particle. It is devided in two branches.

1.       Statics

2.       Dynamics  

STATICS

                         It is the branch of engineering mechanics , which deals with the forces and their effects when acting on body or particle at rest

                          In this branch the body is said to be in rest.

DYNAMICS

                          It is the branch of engineering mechanics , which deals with the forces and their effects while acting upon the bodies in motions.

                          In this branch the bodies are said to be in motion under the action of forces or without forces

                          It is devided into two branch.
                      1 .    Kinetics
                      2 .    Kinematics

KINETICS

                          It is the branch of engineering mechanics in which the motion of the body occurred under the action of forces.

KINEMATICS

                         It is the branch of engineering mechanics in which the motion of the body occurred without forces.

RESULTANT FORCE

                         If a number of forces are acting simultaneously on a body or particle , then it is possible to replace all the forces of a single forces which produce the same effect as that produced by all the forces then the single force is called resultant force of all the forces.

Here , R is the resultant force of f1, f2, f3.

EQUILIBRANT

                        The forces acting on a body exactly equalto the resultant force but directed oppositly to the resultant force in the same line of action, called equilibrant.

 Here ,R be the resultant force and r` be the equilibrant.