Right?

So this is a Nerf Vortex nitro on.

Let me get this right on.

This is one off the top 10 most wanted presents for Christmas this year, at least in the U.

K.

So Brady, being the Corning and shrewd filmmaker that years, thought that for Christmas it would be a good ideas.

First, to make a film about this.

Just wanna point out that right at the start, we're not funded by nerve.

We don't get any sponsorship.

Know it looks a bit naff, particularly when you turn it around.

You know, I must admit that as a child, I never got guns.

My parents never bought me gone some, You know, when you look at this, you know, it's certainly something you always wear black.

Yeah, and I walk around like this.

No, You know, there's this glamorizing going called gold culture, and that's that.

This is the physics disc technology where the disk is gone.

So what?

This fire's out.

Our disks, nerve discs.

But basically, when you look at this, it's a mini Frisbee.

Frisbee.

Let's look at it.

A John.

Let's look at it that way.

That's looking it upside down.

So that's what that's what We're finding many Frisbees and you might argue.

Well, why?

Why?

If something that looks like a disk rather than a pellet.

What's what's so special about this?

The great thing about Frisbees is guess when we've seen these being thrown.

I really wish I had a bigger Frisbee to demonstrate this.

What?

This isn't gonna work so well.

But when you troll for its But you've got you gotta think about that.

Like any object that you try.

We gotta think about the aerodynamics you think about.

How does it stay up in the air?

What a number of key things is actually very, very complicated and complex.

The physics on.

We can get 20.

Calm down.

Ready?

Ready?

Salivating.

I'll fire Brady.

Right.

So this is an opportunity of long, for for a long time.

Oh, I missed him.

No, I didn't.

Sorry.

Yes.

That's why I was here.

Thank you, George.

So these pellets, I like it.

Like many Frisbees, the nerve disc technology, as it says on the box.

But basically, it's just a mini Frisbee.

You can see it's just like a scaled down Frisbee on DDE.

The aerodynamics of Frisbees is actually quite complex and complicated because you might argue away if they got that ship.

Well, first of all, it's got to stay up in the air, so you've got to generate lift somehow.

And this thing is almost like a little miniature airplane ring on an aero foil.

And the key thing here is that you've got to control the velocity, the speed of the air around this thing.

You've got a generator pressure difference and pressure difference that gives this thing left.

Okay.

But in fact, if you look at this and quite a bit of detail, although you get left, if this thing was just static, if it was just it was just going through the air like that wasn't spinning than in fact, it would very rapidly tip over and basically would be very aerodynamically unstable.

Great thing about Frisbees is that I wish I could do this a bit better and spend it on my finger.

But when it's spinning, the important thing is spending is basically a generating, angular momentum.

And once it's spinning, so its angular momentum is directed in one direction and once it was spinning in that direction with this wonderful thing called the right hand real.

So the spinning is in that direction.

The angular momentum, which is a vector quantity.

So it's got a magnitude has gotten a man has got a direction.

It's pointing upwards.

Important things.

Angular momentum is conserved quantity in physics.

So this thing, once you get it spinning in a certain access, it wants to remain spinning and that access unless you generated talk via the air, for example, unless you've got lots of wind.

But if you're working with relatively calm conditions than these things, that the stability of a Frisbee owes almost everything to the fact that it's actually spinning and that's spinning keeps it keeps its oriented in a particular plan.

What we should do is work out what velocity They're coming at the end of it.

So one way to do that on I advise anybody who gets one of these for Christmas, any of youse a boarding scientists go out and do this, get a high speed camera that might be a bit expensive.

You could book your parents for that as well.

Get a ruler, get lots of light on, then just stick a ruler at the the the exit off, the gone What's it called the barrel?

Know the end of the barrel Mosul, the muzzle of the gun and then work out just how fast they come out of that you've got its angular momentum is directed like this, and it doesn't really want It takes an awful lot to actually perturb it from that it really wants to.

And he actually, if you if you turn it away from that, it will restore itself back Thio that the planet was in.

It's just like if you're riding on a bike, it's very, very difficult.

If you're just trying to stay a static on a bike, you goto one side, but you actually writing up like you got angular momentum on the wheels.

Then you know you stay and you've got a much greater dealer.

Stability is exactly the same here, so if this is static, it's pretty unstable, and it will flip over.

If it's spinning, it's much more stable.

I looked up the position like they do in the war.

Oh, I'll try and catch them.

It's It is very physics loaded, So in terms off, you've got a spring loaded clip.

Obviously, she got the elastic energy stored in this spring loose spring Laura clip.

And what after is doing this was releasing the the disk into the barrel of the gun.

And then it's being driven forward.

There's a motor here that's not cricket, so you can hear that generating.

I don't if you're going to see much.

Unfortunately on, it's that which generates the force, which spits this thing thing out.

I think most Christmas presents of a huge amount of physics in the May.

See, What did I get?

I was pretty nerdy asses.

Ah, young boy.

So the Christmas present I got was a microscope on.

I got a chemistry set and I got a physics set.

What toys?

Any toy, any simple toy, or even a scooter or a bicycle.

Physics.

That's that's what controls emotion, practically everything in the world.

Everything in the universe, you could break down to physics.

So who's Christmas present is that?

That's nobody's Christmas presents.

So my son is three years old, is he's too young for this, but I don't think I'll buy it.

For many women in the first place I think it's for older kids so that eyes going to remain in the department and we can use it for various different demonstrations, in fact might well bring it into lectures on Keep the undergraduates under control would be quite good, because at the moment, if I fall asleep or they make noise, I poked him with a big stick.

This would be much more fun.