Law Of Polygon | Mechanical Engineering

If a body is subjected to many forces on its plane at a single point then they are called as Coplanar Concurrent Forces. The effect of the forces acting on the body is unknown. It is necessary to determine the resultant force of the coplanar forces to know this effect. Copy the link given below and paste it in new browser window to get more information on Law Of Polygon:-
http://www.transtutors.com/homework-help/mechanical-engineering/force-systems-and-analysis/law-of-polygon.aspx

1. Law of Polygon

2. Introduction Basic Concepts Composition of forces Resultant Force Polygon Law of Forces Analytical Method Graphical Method Examples CONTENTS

3. Introduction Coplanar and non-coplanar forces Collinear and non-collinear forces Concurrent and non-concurrent forces Parallel and non-parallel forces

4. Basic Concepts Composition of Forces Resolution of Forces

5. Polygon Law of Forces If a number of forces acting on a point be represented by the sides of a polygon taken in order then their resultant is obtained by the closing side of the polygon taken in opposite order.

6. Polygon Law of Forces – Graphical Method

7. Example Three forces A, B and C of magnitude 30 kN , 25 kN and 45 kN respectively are acting at a point as shown in figure. Determine the magnitude and the direction of the resultant force of the system of forces.

8. Example Determine A string ABCDE whose one end A is fixed to the wall and the other end E is loaded with a weight of 300N. The string passes through a frictionless pulley and other two weights are hung at B and C as shown in figure. Determine the tension in the string and the magnitude of weights W 1 and W 2 .

9. Hey Friend, This was just a summary on Law of Polygon . For more detailed information on this topic, please type the link given below or copy it from the description of this PPT and open it in a new browser window. www.transtutors.com/homework-help/mechanical-engineering/force-systems-and-analysis/law-of-polygon.aspx