System Of Forces | Engineering Mechanics

System Of Forces:-

We know that when single agency is acting on a particle it is called as force but when number of forces simultaneously acting on the particle then the system so formed is called as system of forces.

Fig: System Of Forces 

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Types Of Force System:- 

1. Co-planar Force System:-

The force system in which all forces are acting in the same plane us known as coplanar force system.

2.Non-coplanar force system
A force system in which the forces acting in different planes is called as Non-coplaner force system.

3.Collinear force system
The forces which are acting along the same straight line are called as collinear forces.

Read also- What is Mechanics 

4.Non-collinear force system
The forces which are not acting along a straight line are called as Non-collinear forces.

5.Concurrent force system
The forces which are passing through a common point are called concurrent forces.

6. Non-concurrent force system
The forces which are not passing through a common point are called as non-concurrent forces.

7.Like parellel force system
The forces which are parallel to each
other and having same direction are called as like parallel forces.

8.Unlike parellel force system
The forces which are parallel to each
other and having different directions are called as unlike parallel forces.

Type of force:

1)Contact force

• Force produced by direct contact of bodies is called as contact force. 
• it may be of pull type or push type.

2)Body forces

• Forces produced without contact of the body is is called body force. 
• It is the  force holds together the particles forming the rigid body. 

3)Point force

• Force acting at a point is called as point force. 
• It acts on a very small area compared to total surface are   
  

4)Distributed force
• then force is distributed over large area it is called as distributed force.

5) External and internal force
• The force exerted by weight on a body is external for while the resistance offered to retain its shape is called internal force

6)Action and reaction force

• As per Newton’s third law whenever a body exerts force on other body the other body exerts similar force on the former body known as reaction 
• Action=Reaction 

 7)Frictional force
• resisting force offered during sliding of a body the surface in contact is called frictional force

8)Wind force

• force exerted by wind when it is obstructed by any object is known as wind force

9)Cohesion and adhesion

• Force developed between molecules of same material is called as cohesive force.
• Force developed between molecules of different materials is called adhesive force. 

10)Hydrostatic force

• force exerted by water on a body when it is extracted by a body is called as hydrostatic force.