Name: ゴムバンドキャノン - 子どもと一緒に科学する - EXPERIMENTAL #1 (Rubber band cannons - Science with children - ExpeRimental #1)
Uploaded: 2021-01-14T08:32:40.000Z
Duration: 5 min 36 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

This is a simple toy cannon that's easy to make.

My boys have had loads of fun playing with it. I'll explain how to make it

in a moment, but the thing I love about it

is the fact that it allows children to explore energy,

forces, and motion all while making something.

You can fire different things out of it. You can control how much

you pull the rubber bands back. You can change the angle.

In other words you can explore projectile motion,

the way in which things fly through the air.

To make one of these cannons, you need to start by cutting off the bottom

of one of these crisp tins. So we'll take the scissors

You'll probably want to do this yourself because it's a little tricky

and then on the other. What these are going to do

is provide the attachment point for your rubber bands.

So here go two rubber bands: one on one side,

Then, with some masking tape you can secure

So here we are, ready to go, and now tear that off.

is ready and in place. We can set that aside

to poke a little hole in the bottle like that

Again you want to be a little careful with the scissors.

With that in place we're now going to take a pencil

Force it through, and now our bottle is ready.

We can assemble the entire device by putting this plunger

Our cannon is now made and ready to fire.

You can use any projectile you want and I've got a variety of balls here.

But of course if you're playing inside I suggest you use

these scrunched up balls of tinfoil. You can drop them in

and using these you can actually minimize the amount wreckage

The cannon is a simple device to transfer energy from one thing

When I pull the bottle back, energy from me

is stored in the rubber bands. When I release the bottle

that energy is transferred into the movement of the projectile,

Why don't we make a stack of stuff, where you have to try to knock everything down?

Simply asking a few questions while you're doing this activity

might help you and your kids get a little bit more out of it.

What do you think makes for the best catapult?

But actually highest is really hard to measure...

So what does that mean, if it's really heavy? What happens?

It doesn't go high. It just goes up like that.

I like this activity because it's quite fun

and it's kind of cool when you have to go back and

remake your catapult and and make it better and better,

they fire really well, and I think we should get them