Newton's Laws: Crash Course Physics #5

I'm sure you've heard of Isaac Newton and maybe of some of his laws. Like, that thing about "equal and opposite reactions" and such. But what do his laws mean? And how do they help us understand the world around us? In this episode of Crash Course Physics, Shini talks to us about just that.

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Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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[crashcourse]

We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!

[randallpcrittenden]

My favorite explanation of Newtons laws comes from my high school Physics teacher:
1.) Stuff is hard to shake
2.) More stuff is harder to shake
3.) Stuff pushes back

[undergroundskeptic]

"Now the normal force isn't like most other forces. It's special."

so much for normal.

[kamalbhamra]

A student in bed will remain in bed until acted upon by a large enough panic : The lesser known Newton's 4th Law.

[VikaS-ukxg]

When your physics final is tomorrow and you tryna learn everything the night before... 😂😂😂

[sniperammow]

Newton slaps top of car. Car slaps newton back. Equal and opposite force!

[bryanu]

"There will be no Christmas without physics"
*Reindeer flies with sleigh*
(Defies physics)

[JayTohab]

Newton's Laws of Motion:

0:53 - First Law (Inertia): "An object in motion will remain in motion, and an object at rest will remain at rest, unless acted upon by a force."

1:37 - Second Law (Fn = ma): "Net force is equal to mass times acceleration."

3:40 - Third Law (Equilibrium): "For every action, there is an equal but opposite reaction."

4:52 - Further explanation on Normal Force and Tension Force

[EugeneKhutoryansky]

The arrangement of the Rubik's Cube in this episode is still exactly identical to its arrangement from last episode. Unfortunately, this means that no one is even trying to work on it in between episodes. This just isn't right. Whenever you see an unsolved Rubik's Cube sitting around, fixing it should always be a top priority.

[feitocomfruta]

I've gotta say, after watching this series so far, I'm happy they have Dr Somara as the host. Her voice is nice to listen to, and her delivery of the material is engaging. I had to study basic wavelength physics in college for part of my Speech Pathology degree, and I found the course to be a bit dull. I wonder how it will be if and when they discuss it here.

[pilar]

these crash course people are great teachers! much better than the ones in my personal experiences at least...

[joshbreesus]

Stop scrolling through the comments and actually listen to the dang video

[babatulani]

5:01 just completely clarifies my confusions in physics after 5 years.

[itsFisch]

I have this weird habit where I like to watch all these education physics videos after a physic exam....why....

[aarongould]

I can tell im going to watch this video at least 3 more times

[italktoomuch]

"Suppose you threw a 5kg ball up in the air, and then, you know, got out of the way because that could really hurt if it hits you."

This is easier to understand than I thought it would be.

[achild]

I was getting it until the elevator thing ...

[peekyoin]

I cant focus on the video because of my habit reading the comments while watching😂

[DanSolSko]

"And for that we're gonna turn to a physicist you've probably heard of"
Me: BILL NYE THE SCIE....Oh.

[Libbyness]

I love her accent, not gonna lie. Especially how she says equilibrium :3