Engineering Mechanics

(^608) „„„„„ A Textbook of Engineering Mechanics Fig. 30.6. Motion on inclined plane. Now consider a body moving downwards on an ...

Chapter 30 : Work, Power and Energy „„„„„ 609 Power of the locomotive We know that resistance due to inclination = mg sin α = 20 ...

(^610) „„„„„ A Textbook of Engineering Mechanics and work done in one second = Total resisting force × Distance = 101.5 × 10 = 1 ...

Chapter 30 : Work, Power and Energy „„„„„ 611 (b) Power required to propel the truck on a level track Since the truck is to move ...

(^612) „„„„„ A Textbook of Engineering Mechanics and force required to accelerate the engine and train = ma = 350 × 0.05 = 17.5 ...

Chapter 30 : Work, Power and Energy „„„„„ 613 30.18. POTENTIAL ENERGY It is the energy possessed by a body, for doing work, by v ...

(^614) „„„„„ A Textbook of Engineering Mechanics Now substituting value of (P = m.a) in equation (i), W = ma × s = mas ...(ii) W ...

Chapter 30 : Work, Power and Energy „„„„„ 615 Solution. Given : Mass of the wagon (m) = 50 t ; Initial velocity (u) = 0 (because ...

(^616) „„„„„ A Textbook of Engineering Mechanics Fig. 30.9. From the geometry of the figure, we find that when the body swings t ...

Chapter 30 : Work, Power and Energy „„„„„ 617 ∴ Kinetic energy at B (^2) (2 )^2 22 mv mgy == =mgy and potential energy at B = mg ...

(^618) „„„„„ A Textbook of Engineering Mechanics 30.22. PILE AND PILE HAMMER A pile, in its simplest form, is a body of conical ...

Chapter 30 : Work, Power and Energy „„„„„ 619 Now substituting the value of (v^2 = 2gh) in the above equation, (^22) () 2( ) mgh ...

(^620) „„„„„ A Textbook of Engineering Mechanics EXERCISE 30.3 A truck of mass 1.5 t is running at a speed of 54 km.p.h. Find i ...

Chapter 30 : Work, Power and Energy „„„„„ 621 (b) no force acts on the body, but displacement takes place, (c) either (a) or (b) ...

(^622) „„„„„ A Textbook of Engineering Mechanics 622 Kinetics of Motion of Rotation 31 CHAPTERCHAPTERCHAPTERCHAPTERCHAPTER Conte ...

Chapter 31 : Kinetics of Motion of Rotation „„„„„ 623 where F = Force acting on the body, and l = Perpendicular distance between ...

(^624) „„„„„ A Textbook of Engineering Mechanics where m 1 , m 2 , m 3 ...... are the masses of the various elements of a body a ...

Chapter 31 : Kinetics of Motion of Rotation „„„„„ 625 Fig. 31.5. Circular lamina. The mass moment of inertia of the whole rod ma ...

(^626) „„„„„ A Textbook of Engineering Mechanics 3 0 2 r mxdxπ∫ 44 0 2 42 r xmr m ⎡⎤ π π=⎢⎥ ⎣⎦ 2 0.5^2 2 Mr = Mr ...(Q M = πr^2 ...

Chapter 31 : Kinetics of Motion of Rotation „„„„„ 627 = 523 4 2 253 r r mxrx rx + π⎡⎤ ⎢⎥+ ⎣⎦ = 52 (^82) 0.4 2 15 5 mr Mr M ...