tailieunhanh - Engineering Mechanics - Statics Episode 1 Part 3

Tham khảo tài liệu 'engineering mechanics - statics episode 1 part 3', 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 2 b 8 m c 3 m d 4 m Solution Í -c r-3 A r -d - b k 7 r 12 k 4 J m r 13 m ra Ì k YJ acos r a a . k YJ r k deg Problem 2-83 Express the position vector r in Cartesian vector form then determine its magnitude and coordinate direction angles. Given a 8 ft b 2 ft c 5 ft Ỡ 30 deg 0 20 deg Solution r -ccos 0 sin ớ r a - ccos 0 cos ớ r ft r ft k b c sin 0 k 82 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 2 a a c Y a c Y acos A deg I 51 Problem 2-84 Determine the length of the connecting rod AB by first formulating a Cartesian position vector from A to B and then determining its magnitude. Given b 16 in a 5 in a 30 deg Solution a sin a b b r c -a cos a 7 Ì r in r 19in Problem 2-85 Determine the length of member AB of the truss by first establishing a Cartesian position vector from A to B and then determining its magnitude. Given a -- m b m c m d m 0 - 40 deg 83 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 .