yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

The Bullet Block Experiment


2m read
·Nov 10, 2024

Alright, here is the setup:

I have a rifle mounted vertically and we're going to shoot a bullet into this block, right into the middle of it. So obviously the block is going to go flying into the air. But we're going to do this again and instead of firing the bullet right into the middle of the block, we're going to shoot it off to one side and I want you to make a prediction.

Will that spinning block, when we shoot it to one side, will it go the same height as this first block? Will it go not as high? Or will it go higher?

OK, so versus being shot in the middle, when you shoot on the side is the question, right? Yeah. How high will it go in comparison?

It depends on if the bullet stays in the block - and I'm assuming it does?

It does stay in the block, yes, I'll guarantee you that. Same height.

I'm purely basing it on just like an instinct that I have. I feel like I'm being tricked.

I just feel like you're trying to trick us and that it's going to do something that we can't predict. I feel like the obvious answer is not as high so I'm going to say higher. I'll say higher, but it's going to like fly in a different direction or something.

So you have angular momentum, which is L, and you have translational momentum, which is P. When you hit it in the middle of the block, the block doesn't really spin at all so it just goes up to a certain height.

But when you hit it on the side of the block, it's going to be spinning so it's going to have imparted some kinetic energy so there won't be as much potential energy.

So the total energy of the system basically has to stay constant and the kinetic plus potential, which would be the height it goes to will have to be constant so if it's spinning it has kinetic energy, it can't go as high.

That's my prediction. So my prediction is it'll go up, not as high but it'll spin more if it's hit to the side.

Am I wrong? I want you to think which do you think is the most reasonable and then click one of the annotations above. Alright, are you ready?

Make your prediction in three, two, one...

More Articles

View All
When You Miss Someone (An ex, a friend, a family member)
Most of us have been in a position in which we had to say goodbye to someone dear to us. This could be because of the cycle of life and death. But this could also be because of a breakup or being separated from friends by moving to another country. When w…
Writing proportional equations | Rates & proportional relationships | 7th grade | Khan Academy
We’re told that Justin runs at a constant rate, traveling 17 kilometers in two hours. Write an equation that shows the relationship between the distance he runs, ( d ), in kilometers and the time he spends running, ( h ), in hours. So pause this video and…
Magic Without Lies | Cosmos: Possible Worlds
In the quantum universe, there’s an undiscovered frontier where the laws of our world give way to the ones that apply on the tiniest scale we know. They’re divorced from our everyday experience. How can you think about a world that has different rules tha…
Multiplying & dividing rational expressions: monomials | High School Math | Khan Academy
So up here we are multiplying two rational expressions, and here we’re dividing one rational expression by another one. What I encourage you to do is pause these videos and think about what these become when you multiply them out. Maybe you simplify it a …
The TRUTH about Fundrise Real Estate Investing
What’s up you guys? It’s Graham here. So this gets brought up a lot: Fundrise real estate investing with some pretty substantial returns. So what do I think about it? Is it legit? Is it a good way to invest in real estate, or is it just an overly simplifi…
Photon Momentum | Quantum physics | Physics | Khan Academy
[Music] A while back I was teaching physics in California. I got to class and I was all like, “Hey class, you want to hear a physics joke?” “Yeah, okay totally!” “Does light hold mass?” “I don’t know, does it?” “No, it’s not even Catholic!” Oh man, …