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Gravity related youtube videos.

 
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Furcurequs
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PostPosted: Fri Nov 24, 2017 5:58 pm    Post subject: Gravity related youtube videos. Reply with quote Report Post to Admin

Here are some gravity related youtube videos that I've found interesting.

The first shows an evacuated "drop tower" in Germany. Payloads are launched upwards from the bottom so that experiments can be performed within the payload capsule while "weightless."

The capsule is shot upward at 30g, experiences 0g for about 10 seconds while moving upward and falling back down and then the capsule is decelerated back at the bottom at around 35g to bring it to a stop.

The fellow in the video got his numbers wrong about the distance the capsule falls each second, however.

If it starts at 0 velocity, the distance traveled is simply 1/2 x acceleration x time^2.

Rounding g to 10 m/s^s, that gives us 5 meters it falls in the first second, 15 meters in the second second (20 m total in 2 seconds), 25 meters in the third second (45 m total in 3 seconds), and 35 meters in the fourth second (80 m total in 4 seconds), etc.

https://www.youtube.com/watch?v=4aCMDQsx740

The next two videos are by Bruce Yeany, a middle school science teacher. I've posted some of his videos here before. In the first one of these he talks about his rolling tracks for some of his gravity experiments and in the second video he shows how he constructs some of the tracks.

https://www.youtube.com/watch?v=JWtsOiVxIIE

https://www.youtube.com/watch?v=iHvBoij7-7k

Dwayne



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PostPosted: Sun Jan 07, 2018 10:09 pm    Post subject: re: Gravity related youtube videos. Reply with quote Report Post to Admin

This video isn't specifically gravity related, but I do think some here would find it interesting. It shows a humanoid robot made by the company Boston Dynamics doing acrobatics. The robot even does a back flip. So, not quite the same as the robots I worked with at IBM in the 1980s, which were basically just multi-axis stationary arms.

"What's new, Atlas?"

https://www.youtube.com/watch?v=fRj34o4hN4I

Now, the following video is specifically about gravity. It's approximately 26 minutes long and from the youtube channel Vsauce. In it gravity is explained from the Newtonian perspective through to the Einsteinian - with its notion of mass warped spacetime.

"Which Way Is Down?"

https://www.youtube.com/watch?v=Xc4xYacTu-E


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PostPosted: Fri Jan 12, 2018 8:40 pm    Post subject: re: Gravity related youtube videos. Reply with quote Report Post to Admin

I don't think the following PBS NOVA program has made it to youtube (yet), but some of you may be able to watch it from the PBS web site. The episode is about black holes and is nearly 2 hours long.

"Black Hole Apocalypse"

http://www.pbs.org/video/black-hole-apocalypse-yj34qi/


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Gregory
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PostPosted: Fri Jan 12, 2018 9:40 pm    Post subject: Reply with quote Report Post to Admin

Haha, Vsauce is one of my favourites! It's one of the best channels I think.


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PostPosted: Sat Jan 13, 2018 12:33 am    Post subject: re: Gravity related youtube videos. Reply with quote Report Post to Admin

Hey Gregory,

To be honest, for some reason I typically find Vsauce videos a bit hard to watch. I really don't know for sure why that is, either, because I certainly enjoy science stuff.

Maybe it's because the videos tend to be too long for my short attention span, or perhaps they meander too much for my tastes, or I don't know, maybe it's something else about the presentation and/or music or even the presenter that puts me off to them.

Anyway, whatever it is, I seem to have some sort of mental block when it comes to watching them. I've actually been planning on going back to look at old videos to see if I've missed anything good, but that always seems like a chore to me rather than something to get excited about.

I do try to like them. I'm supposed to like them. ...but I just don't go looking for them like I do with the videos from other youtube channels.

I don't mean to be this way. Just different strokes for different folks, I guess. ...lol


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PostPosted: Sat Jan 13, 2018 9:25 pm    Post subject: Report Post to Admin

Yes, his clips are usually longer. I also got this feeling a few times, but otherwise it was quite enjoyable. Well, I haven't watched all of his videos, only what I was intrested in.

For example, this one about rotational stuff is really a good upload:
https://youtu.be/XHGKIzCcVa0


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