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Engineering Mechanics-8/2/14

Engineering Mechanics
Resultants & Components
Resultant of a force system
Two Methods:
1. Graphical Method
2 Algabrical Method
2 Algabrical Method
1 Mention the co-ordination
2. Evaluate the co-ordination
3. use co-ordinate for direct component.
Recangular component force:
Same angle for indirect or opposite component by pultiplying the original force is called rectangular component force.
R=√ (ΣFx)² + (Σfy)²
Q= Tanꜗ= Σfy/ΣFx
Free Body.
A free body diagram of a body or a group of bodie swhich is isolated from its environment & on which an external forces such as weight applied forces forces contains or reaction & friction reacting.
Different steps of Free body:
(1) Identify the object I want to object
(2) Sketch the draw.
(3)Add specific Gravity.