Moments & Coplanar forces
Moment of a force: This is the product of the magnitude of the forces &
perpendicular distances from any point to the line of action.
Determining the moment:
Tree Steps
(1) Determine perpendicular distance
(2) Calculate the magnitude(volume)of the moment
(3) Determine the sign.
Couple:
Two force that have equal magnitude, opposite direction & different line of actions are called couple.
Types of reaction(Supports) of Beam
(1) Roller or simple support
(2) Hinged or pin Support
(3) Fixed support
Types of loading.
(1) Concentrated loading
(2) Uniformly distributed loading
(3) Uniformly varying loading
Shear forces: The shear force at a section may be defined as the algebraic sum
of all the external forces acting parallel to the section on either left or right
of the section.
Bending moment:
It is the algebraic sum of the moments of all external forces acting on either the
left or the right of the section.
Sunday 09 2014
Saturday 08 2014
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. | ||||||||
Thursday 06 2014
Sunday 02 2014
Sunday 19 2014
Late News
Bangladesh is some political problem now a days. There is no last events for politics. Technical is the main thing. If Govern no how to support to the people & how people enjoy peace from government That enough & that will be good for any government.
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