@marcbreathes: #puzzle #physics #greenscreen

Aquaman On A Skateboard :

No, if it is frictionless it cant spin, nothing Can “grip” it and therefore not spin it

NK54WB :

wasn't it just start spinning due to the Coriolis effect

Nannatheboss :

Roll it off your fingers

𝕱𝖎𝖓𝖓𝕿𝖍𝖊𝕱𝖚𝖓 ≽(• ᴗ •)≼ :

Condense it into a black hole or feed it into one, then throw things in to spin the black hole.

Moordok :

The more important question is could you even know if it was spinning

bassonbudget :

movement is relative. I can rotate myself around the ball and to my point of view the ball is rotating.

sOrB :

I would just run around it so it's spinning relatively to me

trigun1081 :

It’s already spinning due to the coriolis effect

josephgerardot401 :

if its a perfectly uniform sphere with no friction (assuming its also not magnetically polarized) is it even meaningful for it to spin? why dont I just tell you it's already spinning and let you figure it out

kal :

if it’s perfectly spherical it immediately destroys anything it touches due to the infinitely small point of pressure.

Tom :

it's already spinning. prove it's not.

Hufenator :

Don’t hit it, but brush past it with a rod that has a static charge. You’d induce a dipole moment. Assuming there’s internal electrical resistance, which is different from friction, you’d be able to induce a torque and get it to start spinning. If it was a super conductor, the magnetic fields from the eddy currents would probably do something

TheBigBoiZucc :

Place it nearby a small black hole, such that the Penrose affect causes one side to move faster than the other, inducing a spin

Don Julio :

Yes. Hit it with a really powerful laser on one side so the photons dump their momentum causing torque on the ball

Giggle McChuckle :

Can’t you just shine a flashlight on one half of it? Assuming it’s not perfectly reflective the absorbtion of photons would transfer the photons’ momentum on one half, thereby applying torque

Nick Leonard822 :

Assuming it is 100% frictionless you wouldn’t need to you just need to stand there and the rotation of the Earth would cause it to spin

Sultan Unqid :

id ask you to prove that I havent already made it spin

sparkling_spank :

i'll throw it into space. a few hundred thousand rounds about the sun and there'll be slight spin from gravity pulling more on different sides of the ball during orbit

The Lego King :

I’ll see what I can do

Enrico Pucci :

Lee :

Easy. Don’t do anything. It will make one rotation in 24 hours as the Earth rotates.

Realy evil dude 😈 :

if ot can absorb light then yes

flimsedun :

well, because the surface is perfectly frictionless, it cannot be grabbed by friction. And because it is perfectly ridgit, it cannot be grabbed by deformation either. Since it it is perfectly spherical, there are no valleys it can be grabbed by either. So the only two options left i can think of is based on density. if it has non-uniform density, it can be influenced by massive bodies spinning around it, which will make it spin. Otherwise the question is, does it have an electrically conductive material or does it consise of molecules with electrical poles then it can be rotsted either with rotating magnetic flux, or by means of rotating electrical charge

erob837 :

No, you wouldn’t be able to make it spin. Also, you wouldn’t be able to tell if it was spinning

Biomewanderer :

better question, how the hell we gona know if it is spinning💀