Problem 408 Warren Truss - Method of Joints

Problem 408
Compute the force in each member of the Warren truss shown in Fig. P-408.
 

408-warren-truss-method-of-joints.gif

 

Jhun Vert's picture

Calculator Technique for Solving Volume Flow Rate Problems in Calculus

Flow Problems in Calculus Solved by a Formula from Physics | Differential Calculus

The following models of CASIO calculator may work with this method: fx-570ES, fx-570ES Plus, fx-115ES, fx-115ES Plus, fx-991ES, and fx-991ES Plus.
 

The following calculator keys will be used for the solution

Name Key Operation
Shift shift.jpg SHIFT
Mode mode-setup.jpg MODE
Name Key Operation
Stat 1-stat.jpg SHIFT → 1[STAT]
AC ac-off.jpg AC

 

This is one of the series of post in calculator techniques in solving problems. You maybe interested also on my previous post in calculator technique for progression problems and calculator technique for clock problems; both in Algebra.
 

Problem 407 Cantilever Truss - Method of Joints

Problem 407
In the cantilever truss shown in Fig. P-407, compute the force in members AB, BE, and DE.
 

407-cantilever-truss.gif

 

Problem 406 Cantilever Truss - Method of Joints

Problem 406
The cantilever truss in Fig. P-406 is hinged at D and E. Find the force in each member.
 

406-cantilever-truss.gif

 

Problem 405 | Method of Joints

Problem 405
Determine the force in each bar of the truss shown in Fig. P-405 caused by lifting the 120 kN load at a constant velocity of 8 m per sec. What change in these forces, if any, results from placing the roller support at D and the hinge support at A?
 

405-truss-pulley.gif

 

Problem 404 Roof Truss - Method of Joints

Problem 404
Determine the forces in the members of the roof truss shown in Fig. P-404.
 

404-roof-truss.gif

 

Jhun Vert's picture

Calculator Technique for Clock Problems in Algebra

Advance Techniques in Solving Clock Problems in Algebra

The following models of CASIO calculator may work with these methods: fx-570ES, fx-570ES Plus, fx-115ES, fx-115ES Plus, fx-991ES, and fx-991ES Plus.
 

Before we go to Calculator technique, let us first understand the movements of the hands of our continuously driven clock.
 

For simplicity, let "dial" be the unit of one hand movement and there are 60 dials in the complete circle as shown in the figure.
 

Jhun Vert's picture

Calculator Techniques for Solving Progression Problems

This is the first round for series of posts about optimizing the use of calculator in solving math problems. The calculator techniques I am presenting here has been known to many students who are about to take the engineering board exam. Using it will save you plenty of time and use that time in analyzing more complex problems. The following models of CASIO calculator may work with these methods: fx-570ES, fx-570ES Plus, fx-115ES, fx-115ES Plus, fx-991ES, and fx-991ES Plus.
 

Jhun Vert's picture

Calculator for Engineering Board Exam

Any one who took an engineering board examination will agree with me that scientific calculator is our best friend during the examination. It will speed up our work and will allow us to go through the analysis of the problem. In most cases, solving the equation is not the real issue, it is to write the correct equation that matters. If we are able to determine the correct equation of a particular situation, the burden of that problem is over. Our next step is obviously to solve for the desired value. It is important to note that the correct answer can only be derived from the correct equation. To determine the correct equation is where should our brain go, not in finding the solution of that equation. You guess it right, we use our best friend, the scientific calculator, to do the task. Don't do manual calculation please, the examiner will not give you bonus points in finding the roots of
 

$9\sin^{3/4} \theta + 4\sin^{3/2} \theta - 12 = 0$

 

manually. Calculator can easily solve for the value of θ fast and accurate than you.
 

Geometric progression with some given terms

Situation
The 4th term of a geometric progression is 6 and the 10th term is 384.
 

Part 1: What is the common ratio of the G.P.?
A. 1.5
B. 3
C. 2.5
D. 2
 

Part 2: What is the first term?
A. 0.75
B. 1.5
C. 3
D. 0.5
 

Part 3: What is the seventh term?
A. 24
B. 32
C. 48
D. 96
 

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