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Mechanics Labhttp://intro1201.blogspot.com/2015/01/l4.html
- Can you draw a free body diagram? (Just a sketch of your system with forces)
- Can you write out the force balance from the friction lab?
- Where did u = Tan(theta) come from?
- Stress-Strain Diagram: Can you sketch the general shape of a stress-strain diagram for a rubber band? How about the diagram for something brittle like glass?
- Surface Tension - can you describe what the pendant drop test is, and how it works?
Engineering Ethics -
http://intro1201.blogspot.com/2015/04/engineering-ethics.html
Can you name an engineering disaster, and briefly discuss:
- What happened
- Why it happened
- How it could have been prevented
Knowing "there can never be enough rules to anticipate and cover every situation, and even if there were, enforcement would be impossibly expensive and burdensome."
What is needed to uphold and maintain ethical practices?
Engineer’s Obligation to Society, to their employer, to clients, and to other engineers:
- only approve designs that safeguard life, health, welfare, and property of the public
- if an engineer’s professional judgment is overruled resulting in a safety concern, it is their responsibility to notify employers, clients, authority figures, the public, and all involved.
- Engineers should be objective, truthful, and unbiased.
- Engineers should not express opinions in areas they are not qualified in,
- Engineers should not associate with anyone or anything that is unethical
Engineering societies:
What are the advantages of joining an engineering society?
Can you list some of the ENGr societies that are out there?
https://en.wikipedia.org/wiki/List_of_engineering_societies
Can you list some of the ENGr societies that are out there?
https://en.wikipedia.org/wiki/List_of_engineering_societies
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CAD
http://intro1201.blogspot.com/2015/03/inventor-cad.html
What are the different file types for Inventor?
parts - *.ipt
Assemblies - *.iam
Drawings - *.idw
Presentations - *.ipn
Could you create a really simple extrusion?
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Dynamics / Mousetrap
http://intro1201.blogspot.com/2015/03/dynamics.html
A car drives for one hour at 60 miles/hour. How far has it gone?
change in position = (average velocity)* (change in time) = (60 miles/hours)*(1 hour) = 60 miles.
Think about the graphs & how they relate to one another.
position vs. time graph → velocity = slope = ds/dt = change in position / change in time
Velocity vs. time graph →position = vel * time = (mph*hours = miles) = area under curve
Velocity vs. time graph → acceleration = dV/dt = change in velocity / change in time = slope of V-t line
Acceleration vs. time graph → adt = dv (a = dv/dt), area under acceleration curve = change in velocity.
Given a position vs. time graph - can you sketch the shape of a velocity graph?
Given a velocity vs. time graph - could you sketch a position and acceleration graph?
Given an acceleration graph - can you sketch x(t) and v(t)?
Examples:
1.
3.
If there are errors in your position vs. time data, what kinds of errors will you have in your velocity and acceleration data? How do you fix these errors?
Running Man simulation - practice X,V,a!
Turn all but one of the graphs off (click the "+" next to it), try to predict it, then turn the graphs back on to check your answer! Drag the arrows next to velocity and acceleration, or just grab the running man and pull him around.
Ans: Don't look until you try it on your own!
Mathematica:
http://intro1201.blogspot.com/2015/03/computer-tools-for-engrs.html
How to input data:
Function[square bracket, arguments separated with commas]Plus[2,2] = 2+2
Mean[{30, 34, 29, 15}]
Solve:
use "==" - two equal symbols
{{x-2}, {x-3}}
Solve[x^2+x+1==0, x]//N
//N - gives answer in numerical form
{{x-.5-.86i},{x-.5+.86i}}
Solve[a*x^2 + b*x + c==0, x]
x = quadratic formula
Solve system of equations - use {}
Solve[{3 x + 2 y ==15, 3*x - 3*y == 12}, {x, y}]//N
What can you do if there is no analytic solution? (If Solve does not work?)
Graphing:
ListLinePlot[{{1,2}, {3, 4}, {5,3}}]
Plot[Sin[x]/x , {x, -9.4, 9.4}]
Plot3D[Sin[x*y], {x, -Sqrt[3*Pi], Sqrt[3*Pi]}, {y, -Sqrt[3*Pi], Sqrt[3*Pi]}]
*** Mathematica "help" resources -
help - documentation center- 10,000 pages of info on all the functions and examples and tutorials on how to use them.
Project:
Can you still list the 10 steps in the ENGRing method?
PGR.BAT.DCCR.
Go through the notes, email me if anything is confusing!
