Tham khảo tài liệu 'engineering mechanics - statics episode 3 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 8 d2 2 in Ms Solution rfA -1 d2 Ms rfB -1 d1 Ms rfA in rfB in Problem 8-128 The connecting rod is attached to the piston by a pin at B of diameter d1 and to the crank shaft by a bearing A of diameter d2. If the piston is moving upwards and the coefficient of static friction at these points is Ms determine the radius of the friction circle at each connection. Given di 20 mm d2 50 mm Ms Solution rfA 2 d2 Ms rfA mm rfB - d1 Ms rfB 3mm 882 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 8 Problem 8-129 The lawn roller has mass M. If the arm BA is held at angle Ỡ from the horizontal and the coefficient of rolling resistance for the roller is r determine the force P needed to push the roller at constant speed. Neglect friction developed at the axle A and assume that the resultant force P acting on the handle is applied along arm BA . Problem 8-130 The handcart has wheels with a diameter D. If a crate having a weight W is placed on the cart determine the force P that must be applied to the handle to overcome the rolling resistance. The coefficient of rolling resistance is ụ. Neglect the weight of the cart. 883 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 .
