Engineering Mechanics
Chapter 3 : Moments and Their Applications 29 Mathematically, moment, M=P × l where P= Force acting on the body, and l= Pe ...
(^30) A Textbook of Engineering Mechanics 3.8. VARIGNON’S PRINCIPLE OF MOMENTS (OR LAW OF MOMENTS) It states, “If a number ...
Chapter 3 : Moments and Their Applications 31 Example 3.2. A uniform plank ABC of weight 30 N and 2 m long is supported at ...
(^32) A Textbook of Engineering Mechanics ∴ 2 3 W Pr×= ×r π or 2 3 W P= π Ans. Example 3.4. A uniform wheel of 600 mm diam ...
Chapter 3 : Moments and Their Applications 33 A beam AB 5 m long is supported at its ends A and B. Two point loads W 1 an ...
(^34) A Textbook of Engineering Mechanics Example 3.5. Three forces of 2P, 3P and 4P act along the three sides of an equil ...
Chapter 3 : Moments and Their Applications 35 Solution. The system of given forces is shown in Fig. 3.12. Magnitude of the ...
(^36) A Textbook of Engineering Mechanics Fig. 3.14. and now resolving all the forces vertically, ΣV = 7 + 8 cos α – 5 cos ...
Chapter 3 : Moments and Their Applications 37 Let α = Angle which the resultant force makes with the horizontal. ∴ –15.656 ...
(^38) A Textbook of Engineering Mechanics 3.11.LEVERS A lever is a rigid bar (straight, curved or bent) and is hinged at o ...
Chapter 3 : Moments and Their Applications 39 Example 3.9. Find the tension required in the operating wire to raise the si ...
(^40) A Textbook of Engineering Mechanics Example 3.12. The lever ABC of a component of a machine is hinged at B, and is s ...
Chapter 3 : Moments and Their Applications 41 Fig. 3.20. Compound levers A little consideration will show, that in a compo ...
(^42) A Textbook of Engineering Mechanics A square ABCD of 60 mm side is subjected to force of 10 N, 20 N, 30 N and 40 N ...
Chapter 4 : Parallel Forces and Couples 43 Parallel Forces and Couples 43 Contents Introduction. Classification of Parall ...
(^44) A Textbook of Engineering Mechanics their directions : Like parallel forces. Unlike parallel forces. 4.3. LIKE PAR ...
Chapter 4 : Parallel Forces and Couples 45 Now taking clockwise and anticlockwise moments of the forces about C and equati ...
(^46) A Textbook of Engineering Mechanics Point where the resultant force acts Let x = Distance between the lines of actio ...
Chapter 4 : Parallel Forces and Couples 47 Similarly draw bc and cd equal to and parallel to the forces BC (P 2 ) and CD ...
(^48) A Textbook of Engineering Mechanics Now select some suitable point o, and join oa, ob, oc, od and oe. Now take some ...
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