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

Introduction to Middle school physics | Khan Academy


2m read
·Nov 10, 2024

Hi everyone! Sal Khan here and welcome to Middle School Physics. I have Iman Howard who manages all of our STEM content.

Iman, why should folks be excited about Middle School Physics?

So, Middle School Physics is like the only science out there that explains how things happen. Basically, everything's made of matter—me, you, um, the chair that I'm sitting on. This course is going to explore how we exist in the natural world. For example, we talk a little bit about movement and forces, and we learn that everything—everything that we have a collision with—has this equal but opposite force that's applied when the collision happens.

That's why when you give those high fives and then your hand starts stinging, it's because the same force you gave your buddy is the same force they gave you back. Then we also talk about force in a way where it doesn't touch you. I'm thinking like Star Wars—there's like this force energy, like gravitational, there's magnetic energy, there's electric energy.

And then finally we get into waves, and we talk a little bit about how waves exist—whether it's sound waves or even the waves in the ocean.

What do you think's exciting?

Oh, well, that's a dangerous question to ask me! I wanted to be a physicist, and I still aspire to be it because, you know, we kind of wake up in this cosmos and we're just trying to understand where we fit in. Physics asks the most fundamental questions about how the universe works.

When I first learned about Newton's laws and fields and all the things that you just touched on, it started to give me goosebumps because I'm like, wow, we can finally understand how the universe fits together and then use that to make predictions and think about things that we don't understand.

And there is so much that we don't understand! So I think this is the beginning of a very, very exciting journey in physics.

I agree!

More Articles

View All
Calculating change in spending or taxes to close output gaps | AP Macroeconomics | Khan Academy
So we have two different economies depicted here. On the left, we have an economy where its short-run equilibrium output is above its full employment output, and so it has a positive output gap. It might seem like a good thing that your economy is just do…
How To WIN THE LOTTERY - 100% Guaranteed
What’s up guys, it’s Graham here! So, I think we’ve just unlocked the brand new infinite money glitch because, as of yesterday, the expected payout of each Powerball lottery ticket became positive. Meaning the total prize pot has grown so massive that if …
Geometric series word problems: swing | Algebra 2 | Khan Academy
We’re told a monkey is swinging from a tree. On the first swing, she passes through an arc of 24 meters. With each swing, she passes through an arc one half the length of the previous swing. So what’s going on here? Let’s say this is the top of the rope …
How does minimum wage hurt workers? (again)
After watching Edgar the Exploiter, some people still don’t follow exactly why we should suppose that raising or introducing the minimum wage will result in a greater number of workers judged to be capable of only low productivity by their employers end u…
15 Things You Didn't Know About NIKE
Fifteen things you didn’t know about Nike. Welcome to a Lux Calm, the place where future billionaires come to get inspired. Hello, Aluxers, and welcome to another exciting original video presented by Alux.com. Nike is one of the world’s top producers of …
STOP SAVING MONEY | The Warning Of Hyper Inflation
What’s up? Grandma’s guys here. So, there’s no easy way to say this, but let’s just rip off the Band-Aid. Yes, it’s true, I’ve worn the same shirt now for the last few days so I wouldn’t have to do laundry. Oh, and yeah, inflation is spiraling out of cont…