In this story, I teach a little bit of physics. About the ''principle of equivalence" or Einstein's happiest thought - that's how he called this theory!

You: Why do you teach about the principle of equivalence in this story?

Me: Because, in this story we go underground to the Lab of the Frog with the one eye where she’s building a spaceship.

When we go into the spaceship, we enter through the kitchen. So the Frog with the one eye shows us her fridge. Because we are sandwich lovers, we ask her to show us how to make a sandwich in space

That’s when it’s appropriate to explain that everything ‘floats’ in space. But, It doesn’t really float!

I’ll tell you a secret: things don’t really ”float” in the space station. What’s actually happening is that they in free fall. But everything in the space station is falling at the same time. So it looks like things are floating, but they are really ”falling”, they are in acceleration.

Einstein’s happiest thought is just that! 

When you are in free fall, lack of gravity and acceleration look the same. At that moment, you don’t know if there is no gravity or if everything is accelerated. You can’t tell the difference. And that’s why it’s called the principle of equivalence.

We laughed a lot in this story imagining making a sandwich in the spaceship.

Join our laughs and get your mind expanded with some physics!

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