Engineering Mechanics

Chapter 1 : Introduction „„„„„ 9 sin^2 θ + cos^2 θ = 1 1 + tan^2 θ = sec^2 θ 1 + cot^2 θ = cosec^2 θ sin^2 1– cos2 2 A ...

(^10) „„„„„ A Textbook of Engineering Mechanics Following are the rules to remember the above 30 formulae : Rule 1. Trigonometri ...

Chapter 1 : Introduction „„„„„ 11 If the differential coefficient of a function is zero, the function is either maximum or mini ...

(^12) „„„„„ A Textbook of Engineering Mechanics Fig. 1.3. Take a point A, and draw line AB parallel and equal in magnitude to th ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 13 2 CHAPTERCHAPTERCHAPTERCHAPTERCHAPTER 13 Contents Introduction. Effec ...

(^14) „„„„„ A Textbook of Engineering Mechanics Sometimes, the applied force may not be sufficient to move a body, e.g., if we t ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 15 Concurrent forces. The forces, which meet at one point, are known as ...

(^16) „„„„„ A Textbook of Engineering Mechanics Note. It the angle (α) which the resultant force makes with the other force F 2 ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 17 ∴ 22 22 0.866 0.866 0.577 40 – 0.5 40 – 0.5 FF FF × == × 2 22 0.866 40 ...

(^18) „„„„„ A Textbook of Engineering Mechanics Example 2.4. A machine component 1.5 m long and weight 1000 N is supported by tw ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 19 Fig. 2.3. Example 2.5. A triangle ABC has its side AB = 40 mm along po ...

(^20) „„„„„ A Textbook of Engineering Mechanics Direction of the resultant force Let θ = Angle which the resultant force makes w ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 21 Example 2.8. The following forces act at a point : (i)20 N inclined at ...

(^22) „„„„„ A Textbook of Engineering Mechanics Example 2.9. A horizontal line PQRS is 12 m long, where PQ = QR = RS = 4 m. Forc ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 23 EXERCISE 2.1 Find the resultant of two forces equal to 50 N and 30 N ...

(^24) „„„„„ A Textbook of Engineering Mechanics Use of Bow’s notations. All the forces in the space diagram are named by using ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 25 First of all, name the forces according to Bow’s notations as shown in ...

(^26) „„„„„ A Textbook of Engineering Mechanics First of all, draw the space diagram with the given system of forces and name th ...

Chapter 2 : Composition and Resolution of Forces „„„„„ 27 OBJECTIVE TYPE QUESTIONS Which of the following statement is correct? ...

(^28) „„„„„ A Textbook of Engineering Mechanics 28 3.1. INTRODUCTION In the previous chapter, we have been discussing the effect ...