This Crazy Physics Trick Makes Gravity Easy!

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[ScienceAsylum]

*Clarification 1:* Some of you seem to be confusing weight with _apparent_ weight. This is understandable since apparent weight is often referred to as just "weight, " especially in engineering. Astronauts in space are not weightless. Objects in free fall are not weightless. They just don't have _apparent_ weight.

*Clarification 2:* The two sections of the Earth at 7:14 cancel each other's effects because of a balance between mass and distance. The bottom section might be more massive, but it's _also_ farther away from my clone. The top section is less massive, but closer to my clone. It's just the right amount to make the forces the same no matter how deep the hole is. Kind of cool, huh?

[TheAmbientMage]

I laughed at the clone repeatedly catching fire while falling because I am a terrible person.

[dimaryk]

"There is an art, it says, or rather, a knack to flying. The knack lies in learning how to throw yourself at the ground and miss."

[exhalerwolf]

The image of the Earth red shifted while morphing into a tiny black hole... crazy attention to details 👏

[tom_something]

"It's the ability to imagine one type of problem as a completely different problem."
Oh cool I'm really good at that!
"An easier problem."
Aww nuts.

[ibanix]

Hey Nick,

1) Thank you for still giving us content during the rest of the insanity of the outside world
2) At each step in my path as a physics student, I keep learning news ways of "we can't solve this, so we approximate it or use a nifty trick". It was nice to see this one.

[XEinstein]

9:35 I appreciate that idea the most from studying physics. That there are so many phenomena in physics that mathematically are described in exactly the same way. Like voltage and pressure. Flow and current. Etc. Really helps me to understand physics.

[Lucky]

"In Physics, sometimes it's helpful to imagine one problem as a completely different problem."
And you say _mathematicians_ are the ones who like to generalize things to death? 😁

[susmitamohapatra]

2:00 kudos to science asylum for trying to solve the equation symbolically for 4 hours 👏

[jaredhouston]

I'm an out of the box thinker and sometimes I completely forget about the box, this might be a problem.
Great video! This is an amazing way to visualize the falling through earth problem.

[GreatBigBore]

Your idea of rethinking a problem as a different, easier problem really resonates with me. I’ve written computer software for many years, and taught many people how to do it. I tell everyone that one sure sign of a great software developer is judicious laziness. Thanks for your excellent videos 🙏

[cgaccount]

So the answer is 42? Where have I heard that before?😉

[_Vikki_]

the more i watch your videos, the more i get into phyiscs, this is my first time visualizing a 2 particle attraction as a ellipitical orbit problem and later using the earlier one as the special case of 2nd...that was awesome, love your videos, great work sir

[technicallittlemaster]

That orbital one is really a great idea
I have generally used the SHM method for periodic motion under gravity
Great video as always
Please continue making more

[Nebuch]

a great explanation for a tough problem

[olajideewetayo]

I have thought of this falling through the Earth problem abt 10 years ago as a kind of simple harmonic motion, I'm glad today 10yrs later someone confirmed it.

[mr.noname]

This is the best YouTube channel that explains physics from very basic level.

[shopski]

Man, I find your show amazing! The presentation style, the depth and the imagination are all really well balanced.
Thanks for making us smarter ya crazy. And lot's of luck on your journey through space.

[rob-vy]

LOl. Clone bursting into flames every time he passes through the core. Nice touch!

[XEinstein]

8:16 I loved that: some constant stuff multiplied by... Physics teachers should use that sentence all the time.