Love this teacher, keep up the good work Bruce. Cheers

Hey Bruce! I'm just starting out my career as a science teacher and finding your channel has made me so happy. I've been watching every video! Thank you so much!

Bruce, you should really put up a science-themed restaurant, where waiters bring drinks to people like this.

what a wonderful clip, keep going Mr. Bruce. I am from Saudi Arabia and I like to watching your videos.

Your videos are always very inspiring! Thank you!

Bruce, you are simply one of the best. Thanks for all the knowledge and laughs you've shared over the years. You are a true hero, good sir🤝

Fascinating stuff as always!

I haven't watched you in a hot minute but you truly do make science fun.

This is perhaps the most popular experiment in the world.

4:56 the free fall phase is amazing! What I love in free fall, is that raising object are also in free fall...

LOVE the more in depth videos please do more

Thank you Bruce

Great video, I am relieved you didn’t fall off the stadium as you were swinging it round! You will need a hammer thrower with higher speed and strength to see what string length can be achieved😁

I love the idea of having the students build their own apparatus to push find limits. I have been using a trick that I learned in junior high. Take a wire coat hanger and stretch it out into a long diamond shape. If necessary bend the hook so it points straight up when the coat hanger is hung from the top of the diamond. Now the fun part. find an older penny with the Lincoln Memorial of the back. Balance the penny on the hook and try to get it spinning around your index finger. Once it is spinning it is quite stable. Then the trick is to stop it without the penny falling. It takes some practice but it is quite impressive once you get the hang of it. Most coins should work (unless they have a hole in the center) as long as they have one face that is pretty flat. Also, some coat hangers have a bevel cut on the end that may have to be filed flat. Once I get the penny stopped I shake the hanger to prove the penny is not glued on.

This was an epic show of skill, you make it look easy. This is one of those experiments that can mess with people's minds, it can look fake or unreal even when you **know ** this is real. In fact, if you hadn't shown those two fails I would have been one of the first to jokingly mention "glue is still an option" in one way or another haha.

What a Badass

8:17 thats a creative perspective.👍

Crazy you can throw it, I'm gonna try juggling this at some time

Some kind of wizard!

Love it! Nice spinning skills, reminds me of poi or diabolo a bit.

When I taught this topic, I also made some circular saw blades out of paper and attached them to hand drills with magnets. They worked brilliantly for cutting pieces of foam. Just keep your finger clear because that would be a nasty paper cut.

I think you'd love science and futurism with Isaac Arthur. He talks about space based applications of things like this

Bruce the kinda guy you bring a cup of tea , open the door , and wake up in hospital with a bandage on your head😂

I'd love a good youtuber battle of this

I hadn't seen this one before this, it would be interesting to see the change from the concave of earth gravity to the convex of centripetal 'gravity'

Hej Bruce, your students must love you 🙂 I definitely would have back in the days if I had you as my science teacher. But no, there were mostly boring folks… 😞

Make one with students on a swing set!

Turkish tea seller tray, they used to do this to get attention and sell more tea

Very cool. As a kid, I would do this with a stretched out metal coat hangar and a penny

Science!

With an 18ft (~5.5m) string the tray is travelling ~8.2m/s. One revolution ~2.1 seconds.

It's like a miniature form of artificial gravity.

Thanks , for yours vudeos. One simple question. When you release this construction for a "free" fly... seems the center of rotation is somewhere near to water. So, probably there is not enought centifugial acceleration to keep water in place. But it steel there. How it selfbalanced ... ?

It would be good if you could measure the speed of rotation and capture several pictures of the horizontal angle at different speeds of rotation, and then draw conclusions on the horizontal angle of the liquid surface as a function of the speed and the length of string.

Like I know how this works but I can't help myself with feeling the fear of the water falling if one spins it wrongly

This centrifugal force is clear to me, but why sand corns center in rotating water in a bucket?

You are now Certfied Centripetal force bender. 😅

I'm intrigued about the physics of bringing it to a halt without spilling. Why is it easier with shortening the string? It's there a physical reason it's impossible to bring to a stable halt at 14 ft? Is the system stable as it 'coils in' around a cylindrical axis (it looked like it).

I do this trick with my kids in the hammock to give them a ride

Bruce! Did you used ever take your demonstrations to elementary schools in Reno Nevada in the early 2000's? If I found your channel all these years later, wow.

aaaaaaa... ok, now it’s clear why we didn’t fall from the Soviet swing during acceleration, when we made “sunwheel”

I didn’t think you could improve the past video, but you moved it up to a circus level performance.

Someone get this guy some glowing poi lol

I hear cups of water screaming

Well, you are ready for a circus.

If the centripetal force pushes the water towards your hand, why is the water as far away from your hand as it can get? Seems like you're missing at least one force.

The Earth is flat with Firmament, and stationary.

I would love to see the lager one again and the string progressively getting shorter and then eventually stopping it like the short one. 🤔 Edit :never mind I saw it