Engineering Mechanics

(^368) „„„„„ A Textbook of Engineering Mechanics Notes : 1. In this case, the value of u is taken as negative due to upward moti ...

Chapter 17 : Linear Motion „„„„„ 369 Solution. Given : Initial velocity (u) = – 80 m/s (Minus sign due to upward motion) and fin ...

(^370) „„„„„ A Textbook of Engineering Mechanics Solution. First of all, consider the upwards motion of the first stone. In this ...

Chapter 17 : Linear Motion „„„„„ 371 Example 17.19. A stone is thrown vertically up from the top of a tower with a certain initi ...

(^372) „„„„„ A Textbook of Engineering Mechanics Fig. 17.2. Let v 2 = Final velocity of the stone, with which it strikes the pan ...

Chapter 17 : Linear Motion „„„„„ 373 Now consider the motion from O to A. In this case, initial velocity (u) = 0 (because it is ...

(^374) „„„„„ A Textbook of Engineering Mechanics This is a quadratic equation in t. ∴ 24.9 (24.9) – 4^2 4.9 (– 20) 0.71 s 2 4.9 ...

Chapter 17 : Linear Motion „„„„„ 375 Solution. First of all, consider motion of the stone. In this case, initial velocity of sto ...

(^376) „„„„„ A Textbook of Engineering Mechanics A body is projected upwards with a velocity of 30 m/s. Find (a) the time when ...

Chapter 17 : Linear Motion „„„„„ 377 Example 17.26. A body was thrown vertically downwards from the top of a tower and traverses ...

(^378) „„„„„ A Textbook of Engineering Mechanics Since both distances are equal, therefore equating equations (i) and (ii) 4·5 4 ...

Chapter 17 : Linear Motion „„„„„ 379 When the body is moving with a uniform velocity Fig. 17.5. Consider the motion of a body, ...

(^380) „„„„„ A Textbook of Engineering Mechanics Fig. 17.7. Now consider motion of the lift from A to B. We know that area of th ...

Chapter 17 : Linear Motion „„„„„ 381 If the train had moved uniformly with a velocity of 30 km/hr, then the time required to cov ...

(^382) „„„„„ A Textbook of Engineering Mechanics EXERCISE 17.3 A car starts from rest with an acceleration of 4 m/s^2. What is ...

Chapter 17 : Linear Motion „„„„„ 383 OBJECTIVE TYPE QUESTIONS The relationship (^12) 2 sut=+at is applicable to bodies (a) mov ...

(^384) „„„„„ A Textbook of Engineering Mechanics 384 Motion Under Variable Acceleration Contents Introduction. Velocity and Acc ...

Chapter 18 : Motion Under Variable Acceleration „„„„„ 385 18.2.VELOCITY AND ACCELERATION AT ANY INSTANT Fig 18.1. Motion under v ...

(^386) „„„„„ A Textbook of Engineering Mechanics Now differentiating both sides, of the equations, with respect to t, ds 946 tt ...

Chapter 18 : Motion Under Variable Acceleration „„„„„ 387 Solution. Given : Equation of displacement : s = 12t + 3t^2 – 2t^3 ... ...