Read and Analyze the sample problems given. Give a thorough analysis stating what type of situation the author dealt, how the problem was solved, the assumptions that the author considered in solving the problem, and why where these assumptions made. Sample Problem 7.3L.Determine the maximum force P that can be applied to block A in Fig. (a) withoutcausing either block to move.SurfaceA4, = 0.2WA = 100 lbSolutionBThe problem statement indicates that we are to find P that would cause impend-ing motion. However, there are two possible ways in which motion can impend:Surface e impending sliding at surface 1, or impending sliding at surface 2. Becauseimpending sliding is specified but not its location, this is a Type III problem.The free-body diagrams of the entire system and each block are shown inFigs. (b) and (c), respectively. Note that the equilibrium of each block yieldsWg = 200 lb4, = 0.1(a) W = 100 lbN = 100 lbW = 100 lbAN = 100 lbВWg = 200 lbW = 200 lbF2IN = 300 IbF2N2 = 300 lb(b)N = 100 lb and N, = 300 lb, as shown on the FBDS. Attention should be paidto the friction forces. The friction force F2 on the bottom of block B is directedto the left, opposite the direction in which sliding would impend. At surface 1,block A would tend to slide to the right, across the top of block B. Therefore, F,is directed to the left on block A, and to the right on block B. The tendency of F1to slide B to the right is resisted by the friction force F2. Note that F1 and N1 donot appear in the FBD in Fig. (b), because they are internal to the system of bothblocks.Two solutions are presented here to illustrate both methods of analysisdescribed in Art. 7.3.Method of Analysis 1First, assume impending sliding at surface 1. Under this assumption we haveF1 = (Fi)max = (4,)¡ N1 = 0.2(100) = 20 lbThe FBD of block A then givesEF, = 0 +,P – F = 0P = F = 20 lbNext, assume impending sliding at surface 2, which givesF2 = (F2)max = (14,)2 N2 = 0.1(300) = 30 lbFrom the FBD of the entire system, Fig. (b), we then obtainEF = 0P - F2 = 0P = F2 = 30 lb

Consider the given block Here we have to calculate the force P that can be applied to block A…

Read and Analyze the sample problems given. Give a thorough analysis stating what type of situation the author dealt, how the problem was solved, the assumptions that the author considered in solving the problem, and why where these assumptions made

Read and Analyze the sample problems given. Give a thorough analysis stating what type of situation the author dealt, how the problem was solved, the assumptions that the author considered in solving the problem, and why where these assumptions made

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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