@stevemould: The cavendish experiment shows that even the very week force of gravity can be seen between two room scale objects. Even with the naked eye.

gumcuzzl3r :

it was painful but i was happy to donate them for science

Joey Lean :

It’s not a force. It’s a distortion of space-time.

Luke Stokes :

What about air resistance? Would it be more accurate in a vacuum?

Flappingduon :

So what your saying is becauses the casino is sooooo big and I’m soooo small, it’s not me actually going but gravity pulling me to it, thank you

Chilly :

My nickname used to be Big G, but now my friends just call me 6.7 x 10^-11 .

J :

This really puts in perspective how tall of an order this was back in Cavendish’s time.

U wot? :

I did this experiment for my advanced higher physics project, while it did work I got really weird results that I wasn’t able to explain; notably only having 1 side being attracted to a mass made it accelerate quicker than having one mass for each side

mahtor :

This video is extremely well done.

Madrid2026 :

There’s no gravity

Joël de Vries :

Boi-oi-oings had me weeping

Rachel :

so if a person was to.walk towards and then away from a huge monument like out in the open, would walking towards it be ever so slightly easier than walking away from it?

MightyMac :

What if you hang one copper ball on a string and measure its weight, precisely and on a digital readout and then move the big ball under it. The weight of the copper ball should go up without it touching the big ball

Iris !! :

if the smallest bit of magnetism overwhelms the gravity, does the van der waals force not interfere?

jellybeankid :

This was one of my standard lab experiments as an A level Physics student aged 17 or 18 in the UK. Admittedly my teacher - Mr Job - was a super-committed teacher and may have set this up outside the standard curriculum. I recall the apparatus being shielded to protect it from air currents and a light source and mirror being used to measure the angle. I got a G figure of the correct order of magnitude - and doing so played a role in me choosing Physics at university.

Bro :

An_Entire_Spinell :

I’m thinking wouldn’t a large lead block be much more massive than a wrought iron ball?

eleanor 🌼 :

she oscillate on my stationary mass till i reach equilibrium

BeautyLove222 :

Flat earthers when they come across this video 🙂🙂🙂

system31 :

see? my attention span is fine

anto77562 :

honestly I think the biggest variable that effected the outcome in your experiment was the tape measure. not only are you eyeballing it, but tape measures aren't always 100% accurate (technically they never are) so that would account for at least some of the difference between the calculated value and the real value

greenteaeight :

I had rather thought the Cavendish experiment involved a room sized apparatus

definitelynotmy4thacc :

that test lab bench is also a very cool example of some incredibly smart people doing things in ways I would never have considered. being able to flip the masses and using laser reflection to find equilibrium is awesome

pleemgees :

I wrote an undergraduate paper about an experiment using a similar torsion instrument by Loránd Eötvös that showed the equivalence of inertial and gravitational mass. Later scientists found Eötvös’ precision unlikely, since he was quite a large man, and his personal gravity when he got close to make measurements would have had a larger effect than the estimated deviation between the two definitions of mass!

William :

So the example video was a fake?

masse :

Cavendish experiment is really incredible.