. Can you recall a time when a teacher used a test to deliberately punish the class? How do you think that affects a student’s willingness to learn?

## . Can you recall a time when a teacher used a test to deliberately punish the class? How do you think that affects a student’s willingness to learn?

I do not recall such a incidence yet I know … Read More...
Think about a book, television show, or movie that you have seen or read involving detectives or investigators. Was their reasoning inductive or deductive? Justify your answer.

## Think about a book, television show, or movie that you have seen or read involving detectives or investigators. Was their reasoning inductive or deductive? Justify your answer.

The reality of the conclusions reached by deductive profiling is … Read More...

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MCE 260 Fall 2015 Homework 4, due September 22, 2015. PRESENT CLEARLY HOW YOU DEVELOPED THE SOLUTION TO THE PROBLEMS Each problem is worth up to 5 points. Points are given as follows: 5 points: Work was complete and presented clearly, the answer is correct 4 points: Work was complete, but not clearly presented or some errors in calculation 3 points: Some errors or omissions in methods or presentation 2 points: Major errors or omissions in methods or presentation 1 point: Problem was understood but incorrect approach was used DO SOMETHING WITH LINKAGES 1. (5 points) Fig 4-16b shows a Stephenson 6-bar linkage. Assume that the linkage is driven by a constant speed motor on the fixed pivot of link 7. Draw this linkage schematically (dimensions are not important). The link numbering and vector loops are already defined in Fig 4-16b. Add symbols for the angles θ2… θ8 and the lengths L2… L8 to the Figure. 2. (5 points) There are two vector loops (1-2-3-4, and 4-5-6-7-8). Write the vector loop equations as separate X and Y equations for each loop. 3. (5 points) Identify the unknowns that must be solved for doing position analysis. Make sure that the number of unknowns is the same as the number of equations. Hint: “links” 3 and 5 are both on the (rigid) coupler, so there is a simple relationship between the two angles. 4. (5 points) Write the vector loop equations for the inverted crank-slider (Fig. 4-13). Identify the two unknowns that must be solved when it is driven by the slider joint, which means that length b is a known input (as in the hydraulic excavator). Write expressions for the elements of the 2×2 Jacobian matrix. 5. (5 points) Modify the Matlab code fbpos1vec.m to solve the position analysis problem for this system. You may choose the dimensions and the input (probably best to make this similar to Fig 4-13). Show the lines of Matlab code that you changed (and no other lines) and show the values for the two unknowns that you solved. Page 1 of 1

## MCE 260 Fall 2015 Homework 4, due September 22, 2015. PRESENT CLEARLY HOW YOU DEVELOPED THE SOLUTION TO THE PROBLEMS Each problem is worth up to 5 points. Points are given as follows: 5 points: Work was complete and presented clearly, the answer is correct 4 points: Work was complete, but not clearly presented or some errors in calculation 3 points: Some errors or omissions in methods or presentation 2 points: Major errors or omissions in methods or presentation 1 point: Problem was understood but incorrect approach was used DO SOMETHING WITH LINKAGES 1. (5 points) Fig 4-16b shows a Stephenson 6-bar linkage. Assume that the linkage is driven by a constant speed motor on the fixed pivot of link 7. Draw this linkage schematically (dimensions are not important). The link numbering and vector loops are already defined in Fig 4-16b. Add symbols for the angles θ2… θ8 and the lengths L2… L8 to the Figure. 2. (5 points) There are two vector loops (1-2-3-4, and 4-5-6-7-8). Write the vector loop equations as separate X and Y equations for each loop. 3. (5 points) Identify the unknowns that must be solved for doing position analysis. Make sure that the number of unknowns is the same as the number of equations. Hint: “links” 3 and 5 are both on the (rigid) coupler, so there is a simple relationship between the two angles. 4. (5 points) Write the vector loop equations for the inverted crank-slider (Fig. 4-13). Identify the two unknowns that must be solved when it is driven by the slider joint, which means that length b is a known input (as in the hydraulic excavator). Write expressions for the elements of the 2×2 Jacobian matrix. 5. (5 points) Modify the Matlab code fbpos1vec.m to solve the position analysis problem for this system. You may choose the dimensions and the input (probably best to make this similar to Fig 4-13). Show the lines of Matlab code that you changed (and no other lines) and show the values for the two unknowns that you solved. Page 1 of 1

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Suppose a force analysis of a particle in equilibrium produced the following system of equations: 4F C ! 3F B = 500 0.866F A + 0.707F B ! F C = 0 !0.707F B + 0.5F A = 50 Solve this system of linear equations using the Gauss-Jordan Elimination method. a) Show the augmented matrix b) Use elementary row operations to obtain the reduced row echelon form c) Write the solution for the three forces (using 3 significant digits), FA, FB, & FC

## Suppose a force analysis of a particle in equilibrium produced the following system of equations: 4F C ! 3F B = 500 0.866F A + 0.707F B ! F C = 0 !0.707F B + 0.5F A = 50 Solve this system of linear equations using the Gauss-Jordan Elimination method. a) Show the augmented matrix b) Use elementary row operations to obtain the reduced row echelon form c) Write the solution for the three forces (using 3 significant digits), FA, FB, & FC

Click the link to read Chapter 1 of Clausewitz’s On War, and then answer the questions below. http://www.gutenberg.org/files/1946/1946-h/1946-h.htm#2HCH0001 How does Clausewitz define war? A. It is the use of violence to gain wealth. B. It is the way in which states can show their power. C. It is an act of violence intended to compel our opponent to fulfill our will. D. It is no longer a legitimate way to function in a world of international law. E. It is defined by international laws and norms. What are the main motives that cause war, according to Clausewitz? A. Greed and tyranny. B. Instinctive hostility and hostile intention. C. Competition and glory. D. Fear and threat. E. Men and money. What is the polarity principle according to Clausewitz? A. In principle, the world has conflicts that flow from North to South. B. It is like a zero sum game, a win for one yields a loss for the other. C. Two states will tend to find peace before they have to fight. D. The pitch of battle will swing from one end to the other before it ends. E. Humans are both rational and emotional; you must consider both sides. According to Clausewitz the element of War itself is: A. A multifaceted, multiplayer complex system with no central element. B. A duel between two parties on an extensive scale. C. Only made possible through laws that limit violence. D. Completely removed from politics in all aspects. E. Not something that we can understand or study.