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Engineering Mechanics - Statics Episode 3 Part 8

Tham khảo tài liệu 'engineering mechanics - statics episode 3 part 8', 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 11 Solution x l cos ớ Sx -l sin ớ Sỡ y 2 l sin ớ Sy 2 lcos ớ Sỡ SU 0 -2 PSx - 3 Fs 0 2 Plsin ớ Sớ- 3 Fs 2l cos ỡ Sớ 0 P sin ớ 3 Fs cos ớ Since Fs k 2 l sin ớ - l0 then P 3 kcot ớ 2 lsin ớ - l0 Problem 11-11 When ớ ớ0 the uniform block of weight Wb compresses the two vertical springs a distance S. If the uniform links AB and CD each weigh WL determine the magnitude of the applied couple moments M needed to maintain equilibrium. 1082 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 11 Given 3Q 20 deg a 1 ft Wb 50 lb b 4 ft s 4 in c 1 ft Wl 10 lb d 2 ft lb k 2 in Solution 3 3q yi cos ớ s yi sin ở S3 y2 a b cos ớ Sy2 -b sin ớ S3 a y3 y2 - sy3 sy2 SU -2WLSy1 - WbSy2 - 2kSSy3 - 2MS3 0 SU sin ớ Wbb sin ớ 2kSb sin ớ - 2M S3 M Wt Wb ---- b kSb 2 . sin ớ M 52.0 lb-ft 0 Problem 11-12 The spring is unstretched when 3 0. Determine the angle 3 for equilibrium. Due to the roller guide the spring always remains vertical. Neglect the weight of the links. 1083 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 .