tailieunhanh - Engineering Mechanics - Statics Episode 1 Part 5

Tham khảo tài liệu 'engineering mechanics - statics episode 1 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Engineering Mechanics - Statics Chapter 3 I4 m m g s2 Solution Initial guesses Tab 1 N Tac 1 N 0 10 deg Q 10 deg Given -Tac cos Q Tab cos 0 0 Tác sin Q Tab sin 0 - Mg 0 11 cos q 12 cos 0 13 11 sinQ 12 sin 0 14 t Ab Tta T I Q J è Find Tab Tac 0 Q k Q Problem 3-34 A car is to be towed using the rope arrangement shown. The towing force required is P. Determine the minimum length 1 of rope AB so that the tension in either rope AB or AC does not exceed T. Hint Use the equilibrium condition at point A to determine the required angle 0 for attachment then determine 1 using trigonometry applied to triangle ABc. Given P 600 lb T 750 lb Q 30 deg 162 2007 R. C. Hibbeler. Published by Pearson Education Inc. Upper Saddle River NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced in any form or by any means without permission in writing from the publisher. Engineering Mechanics - Statics Chapter 3 d 4 ft Solution The initial guesses Tab T Tac t 0 30 deg l 2 ft Case 1 Assume Tac t Given A s Fx 0 Tác cos ỷ - Tab cos 0 0 t s Fy 0 P - Tácsin ỷ - Tabsin 0 0 d l sin ỷ sin 180deg - 0 - ỷ Táb Ì 0 Tab lb 0 deg li ft I l1 Case 2 Assume Tab t Given - s Fx 0 Tac cos ỷ - Tab cos 0 0 t s Fy 0 P - Tácsin ỷ - Tabsin 0 0 l d Tac Ì 0 I 2 l min sin ỷ sin 180deg - 0 - ỷ Tac 0 deg l2 ft l ft 163 2007 R. C. Hibbeler. Published by Pearson Education Inc. Upper Saddle River NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced in any form or by any means without permission in writing from the .