Skip to 0 minutes and 12 secondsGANGA: Well, that's it. The course is nearly over.
Skip to 0 minutes and 15 secondsROBIN: We hope you've enjoying exploring engineering mechanics, discovering a way of thinking, and developing new skill. We've covered a lot of ground with our experiments, analysis, and design.
Skip to 0 minutes and 29 secondsGANGA: In of course, we have highlighted the engineering mindset.
Skip to 0 minutes and 33 secondsROBIN: We assumed that you already had the basic engineering mechanics toolkit-- that's forces of vector and equilibrium.
Skip to 0 minutes and 40 secondsGANGA: And free-body diagrams of course.
Skip to 0 minutes and 42 secondsROBIN: Of course, and you learned how to use them to find unknown forces in rigid bodies and systems of rigid bodies.
Skip to 0 minutes and 50 secondsGANGA: But where did the loads on these bodies come from?
Skip to 0 minutes and 53 secondsROBIN: We didn't really say.
Skip to 0 minutes and 55 secondsGANGA: So, to start this course, we looked at the different types of loads we might want to include on our free-body diagrams.
Skip to 1 minute and 2 secondsROBIN: In week one it was gravity-- weight and where it acts. We found the centre of gravity. It's another application of moments.
Skip to 1 minute and 12 secondsGANGA: In week two it was friction. Sometimes we want less friction, sometimes we want more. We saw how a rough and ready theory is applied in practise.
Skip to 1 minute and 24 secondsROBIN: In week three it was wind loads, and that introduced a beautiful equation. We applied the analysis to vehicles.
Skip to 1 minute and 34 secondsGANGA: To maintain steady motion of a vehicle, we must overcome drag from our three sources-- hill climbing--
Skip to 1 minute and 40 secondsROBIN: That's gravity.
Skip to 1 minute and 41 secondsGANGA: Rolling resistance--
Skip to 1 minute and 42 secondsROBIN: That's friction.
Skip to 1 minute and 43 secondsGANGA: And air resistance.
Skip to 1 minute and 45 secondsROBIN: That's wind. And we saw how to find the power that a vehicle needs for a specified performance. For that, we needed to know about work, energy and power.
Skip to 1 minute and 55 secondsGANGA: In week 4 we started looking at dynamics, accelerations, but mostly that will be for another time.
Skip to 2 minutes and 3 secondsROBIN: Now, whatever you choose to do in future, you will have begun to have seen the world through engineers' eyes.
Skip to 2 minutes and 10 secondsGANGA: Maybe you have been changed forever.
Through Engineers' Eyes - final thoughts
Congratulations on reaching the end of the course!
The concept wheel shows how the last four weeks fit together. The final short video reviews these weeks. The chances are that you have developed engineers’ eyes.
This is a wrap up week.
Week 4 concept wheel (Click to expand)
In the experiment for this final week, accelerations were present. So we needed Newton’s second law - the heart of Dynamics - and we needed to understand motion. There’s so much more, but we have come to the end of our course, so deeper study will have to wait.
So, we have seen how to represent loads from gravity, friction, and wind. And although it was brief, we have made a start on dynamics. In fact, you can apply what we have learnt about loads to Dynamics too.
We learnt practical skills in engineering mechanics, and along the way our vision expanded to take in more of the engineering world view.
We hope that you have enjoyed learning about Engineering Mechanics through experiment, analysis and design, and that you are getting used to your ‘engineers’ eyes’.
We’ve enjoyed following your discussions and other contributions. Now we would like your overall impressions of the course in the comments section.
If this course has inspired you to consider further academic study in the field of Mechanical Engineering check out the UNSW Mechanical and Manufacturing Engineering website for more details.
We wish you all the very best.
Ganga Prusty and Robin Ford