whoa…check this out!
Can you guess what happens when they placed water droplets on this bizarre surface?
They also coated it with a special compound. Lucky for us these adventurous experimenters filmed it and shows us what happens:
Consider an object starting at rest at the top of a frictionless sphere. The equilibrium at the top is unstable. Any little nudge to one side will cause it to begin sliding down the surface. If the object stays on the surface, the normal force will clearly go to zero when the side become vertical. But will it become zero before that and cause the object to leave the surface?
Here is the type of coating that was put on to give it the low friction effect:
Here the frictionless sphere is a dome of radius 14 cm which has been coated with a super-hydrophobic coating; NeverWet made by Rustoleum. Drops of water on the surface move with very little friction. This was recorded at 300 frames per second to show the motion of the drops clearly.
One of the commenters makes an astute observation as a stickler for physics rules:
it’s not frictionless, it’s hidrofobic
Let’s watch what happens in this TRIPPY effect on page 2
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They should try and apply the frictionless sphere and use the same tactics to make a windshield for cars and then it would be easier to drive in the rain because the water wouldn’t stay on the window it would fall right off not to mention that the windshield wipers would work so much better without the friction
FRICTIONLESS SPHERE… Have fun driving an opaque bubble car!
Like water off a duck’s back.
Freeze Point. A friction-free zone where the asserting and opposing forces are in equilibrium. 33.33333333333. 45.00000000000. SYNCHRONISATION. All movement have a Freeze Point.
What- And no one understands this???????
Uh…what? This is surprising for what reason?
I know- I do this while I’m pissing on something. You wanna do something!!!! A slow moving sphere in a larger faster moving sphere. And a fraction away- a sphere moving at incredible speeds—- then try to enter it.
Oh click saver hero, where art thou?
I’m just interested in the “frictionless” sphere. Just think of all of the possibilities when you can ignore such a basic law of physics! I would make the soles of my shoes frictionless so I can just fart and glide my$#%&!@*home after a long day of work.
What is supposed to happen ? .
Earth’s flat
Very cool, but Clark Griswold did this back in 1989.