Succeed by Failing: Crash Course Kids #42.1 - By Crash Course Kids
Transcript
| 00:09 | Have you ever heard of the expression ? If at | |
| 00:11 | first you don't succeed . Try try again . Well | |
| 00:14 | now you have and if you think about it , | |
| 00:16 | you can't try again without failing . First . Engineers | |
| 00:20 | fail all the time when they're trying to find the | |
| 00:21 | best solution to a problem . In fact , failing | |
| 00:24 | is really important because it helps you figure out how | |
| 00:26 | to make a solution that does work and to do | |
| 00:29 | that , engineers need to find their failed solutions , | |
| 00:31 | failure points . So what is a failure point ? | |
| 00:35 | Yeah . To answer that question , let's revisit some | |
| 00:40 | of the steps we've been using to design and test | |
| 00:43 | the possible solutions to a certain problem . We started | |
| 00:45 | by picking out a single variable the angle of the | |
| 00:48 | ball ramp . Then we did several trials where we | |
| 00:50 | change the angle of the ramp each time and we | |
| 00:52 | had a few failures along the way . In our | |
| 00:55 | first trial , we knocked only some of the pins | |
| 00:57 | down . And in the second trial we got no | |
| 01:00 | pins down at all . But on our third trial | |
| 01:02 | we got the outcome that we wanted strike and we | |
| 01:05 | decided that our solution was a success . Now because | |
| 01:09 | we took the time to pick out one variable , | |
| 01:11 | we could be pretty sure that it had to do | |
| 01:13 | with why our first two trials failed . We figured | |
| 01:15 | out that when the angle of the ball ramp wasn't | |
| 01:17 | right , it sent the ball rolling right into the | |
| 01:19 | gutter . Now in the bowling alley , our solution | |
| 01:21 | pretty much either worked or it didn't . But sometimes | |
| 01:25 | solutions to a problem work for a while and then | |
| 01:27 | don't anymore . At this point , the point where | |
| 01:30 | solution doesn't work anymore is called a solutions failure point | |
| 01:33 | to explore this idea . Let's look at some different | |
| 01:35 | examples . Say you're out in the woods and you | |
| 01:37 | need to cross a stream . Fortunately there is a | |
| 01:40 | solution handy , a small wooden bridge , you can | |
| 01:42 | take the bridge safely across the stream . Right , | |
| 01:44 | Oh , but did I forget to mention that you're | |
| 01:47 | also driving a bulldozer . Now that bridge might not | |
| 01:50 | work at some point , Too much weight will make | |
| 01:53 | the bridge collapse . And that specific amount of weight | |
| 01:56 | would be the bridge's failure point . It's the point | |
| 01:58 | where the solution wouldn't work anymore . It's a place | |
| 02:00 | where an engineer could say , here's why the bridge | |
| 02:03 | failed . Let's look into a pretty famous failure point | |
| 02:06 | involving another bridge . Mhm . The Tacoma narrows bridge | |
| 02:13 | crosses a body of water called the puget sound in | |
| 02:15 | Tacoma Washington . As you can see , the current | |
| 02:18 | bridge has two decks , one that goes in each | |
| 02:20 | direction , but that's not the original bridge . The | |
| 02:23 | original Tacoma narrows bridge opened in july of 1940 it | |
| 02:27 | looks pretty good . Right ? It was a solution | |
| 02:28 | to the problem of getting people across puget sound that | |
| 02:32 | is until november of 1940 . By then , the | |
| 02:36 | bridge had earned itself a nickname , galloping Gertie . | |
| 02:39 | And it's easy to see why wo it turns out | |
| 02:43 | that the failure point of the original Tacoma narrows bridge | |
| 02:46 | was when hitting it at a certain speed and angle | |
| 02:48 | at this angle and speed . The bridge would twist | |
| 02:51 | back and forth , eventually it collapsed . Don't . | |
| 02:54 | No one was hurt . Once engineers figured out that | |
| 02:56 | failure point , they designed and built a new bridge | |
| 02:59 | , one that could withstand winds , like the one | |
| 03:01 | that made all Gertie gallop and that bridge is still | |
| 03:04 | standing . Thanks to what engineers learned from the failure | |
| 03:07 | point of galloping Gertie suspension bridges are stronger and safer | |
| 03:10 | than ever . It's a success story that started out | |
| 03:14 | in a failure . So sometimes solutions have a point | |
| 03:20 | where they don't work anymore . Engineers call these failure | |
| 03:24 | points and engineers try to find them as they develop | |
| 03:26 | solutions for a problem . Really , they want to | |
| 03:29 | identify these points before the final solution is put in | |
| 03:32 | place . That saves lots of time and money and | |
| 03:35 | sometimes live . And sometimes failure points are pretty easy | |
| 03:38 | to find and sometimes they're harder to figure out . | |
| 03:41 | But when engineers do find them , they learn from | |
| 03:44 | them to find even better solutions to a problem . | |
| 03:46 | You wonder how they do that . Exactly . That's | |
| 03:49 | another story for another time . Don't fail to meet | |
| 03:52 | me back here soon . |
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