The Engineering Process: Crash Course Kids #12.2 - By Crash Course Kids
Transcript
| 00:09 | I'm gonna take a wild guess and say you've probably | |
| 00:11 | used the phone and I bet you've enjoyed the benefits | |
| 00:14 | of a little thing . We call air conditioning . | |
| 00:16 | You know , who made those things possible ? Engineers | |
| 00:19 | . We were just talking about engineers in our last | |
| 00:21 | video . People who design and build things to solve | |
| 00:24 | problems . And there are lots of different kinds of | |
| 00:26 | engineers , no matter what type of engineer you want | |
| 00:28 | to be those civil , mechanical , electrical or a | |
| 00:31 | kind that doesn't even exist yet . There's a series | |
| 00:33 | of steps that all engineers follow when they're trying to | |
| 00:36 | solve a problem . This process is called wait for | |
| 00:39 | it . The engineering process makes sense to me . | |
| 00:42 | So what sort of steps are included in the engineering | |
| 00:44 | process and why do we need it ? Let's go | |
| 00:51 | through it step by step and discover how awesome things | |
| 00:54 | are made . First thing you gotta do is just | |
| 00:56 | define the problem . I mean , before you can | |
| 00:58 | solve a problem , you have to figure out what | |
| 01:00 | it is . Right ? For example , back in | |
| 01:02 | the 1800s , an engineer named Alexander Graham Bell was | |
| 01:05 | trying to come up with a simpler , cheaper way | |
| 01:07 | for people to communicate . Back then the best you | |
| 01:10 | could do was a telegraph , which was an old | |
| 01:11 | fashioned system of sending messages over electrical wires . Bell | |
| 01:15 | identified his problem , communicating with people who are far | |
| 01:18 | away . Was expensive and took a lot of time | |
| 01:20 | . So his invention or solution to this problem was | |
| 01:23 | something you may have heard of the telephone . Nice | |
| 01:26 | . Now , once you figured out what problem you | |
| 01:28 | want to tackle , you need to do your research | |
| 01:31 | . You can start by just making a list of | |
| 01:32 | questions you have and what information you need to start | |
| 01:35 | answering them . You can also look around and find | |
| 01:37 | what other things already exist that I've tried to solve | |
| 01:39 | the same problem . Maybe they can be improved . | |
| 01:42 | A good example , here is the man who helped | |
| 01:44 | us blow stuff up . The chemist and engineer Alfred | |
| 01:46 | Nobel invented the explosive known as dynamite . Not because | |
| 01:50 | he particularly enjoyed explosions , but because miners and other | |
| 01:53 | people who well needed to blow stuff up to do | |
| 01:56 | their jobs needed an explosive that was safer to you | |
| 01:59 | . So before he started on that problem , Nobel | |
| 02:02 | did research to see what explosives already existed , which | |
| 02:05 | ones worked well and which ones didn't ? This takes | |
| 02:07 | us to step three , develop a solution . After | |
| 02:10 | your research is done , This is where you say | |
| 02:12 | exactly how you think you can solve the problem and | |
| 02:15 | once you thought of a good solution , you have | |
| 02:17 | to figure out how it will actually work and what | |
| 02:19 | it will look like . So you have to design | |
| 02:21 | your solution . This is where you get to draw | |
| 02:24 | . Civil engineers always sketch out their ideas like buildings | |
| 02:27 | and bridges and towers to show what they'll look like | |
| 02:30 | when they're done . Gustav E Fell designed the famous | |
| 02:32 | Eiffel Tower in France and he definitely showed up on | |
| 02:35 | day one of construction knowing exactly what it was gonna | |
| 02:38 | look like . On to step five build a prototype | |
| 02:42 | . A prototype is just a simple model that lets | |
| 02:44 | you test out your design . It can be as | |
| 02:46 | big as the real thing is going to be or | |
| 02:47 | it can be a smaller version . You just need | |
| 02:49 | to have a prototype so you can test it . | |
| 02:52 | This may be the most important step in the whole | |
| 02:54 | process . Engineers need to test their design to see | |
| 02:57 | if it works like they wanted to . So say | |
| 02:59 | if you're building is a big tower , does it | |
| 03:01 | stand up ? Does it stay standing up if you're | |
| 03:04 | designing something with moving parts , does it work the | |
| 03:06 | way you want ? Now take it from me , | |
| 03:08 | my future engineers , you might have a great idea | |
| 03:11 | , a really terrific solution to a really big problem | |
| 03:14 | . But when you get to this step , your | |
| 03:16 | prototype probably won't work exactly the way you want . | |
| 03:19 | At least not . On the first try . Most | |
| 03:21 | engineers test their prototypes over and over and over again | |
| 03:26 | . That's why a lot of time and brain power | |
| 03:28 | goes into the very last step evaluating your solutions , | |
| 03:32 | evaluating just means asking yourself whether things are working the | |
| 03:35 | way you want or why they are or aren't I | |
| 03:39 | like to think of this step as question everything . | |
| 03:42 | This is what engineers review all of the facts and | |
| 03:44 | ask themselves questions followed by even more questions . What | |
| 03:48 | worked well , why did it work ? Why didn't | |
| 03:51 | it work ? How could it be made better ? | |
| 03:54 | And most of the time the answers to these questions | |
| 03:56 | are going to send you back several steps . Like | |
| 03:59 | once you figured out why your prototype wasn't working , | |
| 04:02 | you'll have to design a new solution and then build | |
| 04:04 | it and then tested again . Sometimes engineers go through | |
| 04:08 | this process 45 even six times or more take Willis | |
| 04:12 | carrier , the inventor of modern air conditioning . He | |
| 04:15 | tested his prototypes four years before he figured out the | |
| 04:18 | design that worked the way he wanted and solve the | |
| 04:20 | problem he wanted to fix . Like all engineers , | |
| 04:23 | he failed a lot before he succeeded and that's okay | |
| 04:27 | because he learned something from every failure which made his | |
| 04:30 | product even better in the end . And I for | |
| 04:32 | one am glad he kept going . Mhm . So | |
| 04:38 | the engineering process is a series of steps that engineers | |
| 04:41 | or anyone should use when they're facing a challenge . | |
| 04:44 | The process is important because it allows engineers to experiment | |
| 04:48 | and also to fail . Both of these things give | |
| 04:51 | engineers a chance to go back and improve on their | |
| 04:53 | original idea , giving us something even better down the | |
| 04:56 | road . So the next time you fail at something | |
| 04:59 | , don't feel too bad , think about the telephone | |
| 05:01 | and the air conditioner and the Eiffel Tower and then | |
| 05:04 | try again . |
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