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. Contact forces are very complicated, and are discussed in more detail in Section 8.

. . 4.7 Simplification of a Force and Couple System If the force system lies in the x-y plane (a 2-D case), then the reduced equivalent system can be obtained using the following three scalar equations. 1.2.2 Vector Manipulation . . .

. . . . . 1.2 Scalars and Vectors . . Professional Publications, Inc. FERC Statics 7-3 Forces. . Note that a closed polygon is obtained if the resultant force is zero. . Statics 7-1 Systems of Forces Statics problems involve a system of balanced forces. . • EhEach force is resoldlved into x and y components and total up all the components using scalar algebra. ... www.ncees.org. . 1.2.1 Representation of Vectors .

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1.2.3 Coordinate Systems . Contact forces can either be measured, or they can be calculated by analyzing forces and deformation in the system of interest. . . . 2.1.3 Units of force and typical magnitudes Solution 263 Thus, R = 161.314 lb upward to the right at x = 21.69 and intercepts at (1.668, 0) and (0, … Engineering Mechanics I Phongsaen PITAKWATCHARA May Contents Preface xiv 1 Introduction to Statics 1.1 Basic Concepts .

Engineering mechanics solved problems pdf. Chapter 4 Force System Resultant. . . . Coplanar Resultant Force [2D] (Rectangular‐Component Method) • Either of the two methods (Scalaror Cartesian vector) can be used to determined the resultants.

In the case of planar forces, the resultant can also be obtained by drawing the vectors of the forces head-to-tail to form the respective force polygon, Figure 2.9. . Problem 263 Determine the resultant of the force system shown in Fig. . . . THREE-DIMENSIONAL FORCE SYSTEMS Today’s Objectives: Students will be able to solve 3-D particle equilibrium problems by a) Drawing a 3-D free body diagram, and, b) Applying the three scalar equations (based on one vector equation) of equilibrium. . . . Contact forces are pressures that act on the small area of contact between two objects. W R = W 1 + W 2 (M R) o = W 1 d 1 + W 2 d 2 The moment of a force about a point provides a measure of the tendency for rotation (sometimes called a torque). . . . . In the 2-D case, the magnitude of the moment is M. . . . . Professional Publications, Inc. FERC Statics 7-4 Resultant Force. Resultant of Forces – Review on vector addition Vector addition Triangle method (head- to-tail method) – Note: the tail of the first vector and the head of the last vector become the tail and head of the resultant principle of the force polygon/triangle Parallelogram method – Note: the resultant is the diagonal . .

1.2.4 Rectangular Coordinate System 1.2.5 Rectangular Coordinate … . .


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. P-263 and its x and y intercepts.