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If the world was frictionless, would the Earth orbit underneath your feet? Would buildings and things attached to the ground be slamming into you at the same speed as the Earth's rotation?
What happens when you step out onto the ice at an ice rink? Why?
You slide because of low friction...
If the world was frictionless, you would not be able to fix anything onto anything else, not even with slamming, because that also depends on friction.
It really isn't answerable: what happens to an object on a frictionless surface depends on how it got there.
But not at anywhere near the earth's rotational speed, right? And if you step onto the ice the right way, very very carefully, you don't slide.
does gravity have anything to do with centripetal force?
How's friction involved when you slam into something?
If the world was frictionless, would the Earth orbit underneath your feet? Would buildings and things attached to the ground be slamming into you at the same speed as the Earth's rotation?
If the world was frictionless, would the Earth orbit underneath your feet? Would buildings and things attached to the ground be slamming into you at the same speed as the Earth's rotation?
@CWatters: I just remembered some stuff with circular motion where there's a force directed towards the centre when i
Twice. First, you have to be attached to the surface of the Earth - rotating - before you can start slamming. Second, after you have managed to slam something into the Earth the only force holing the object slammed into the Earth would be friction. Absent that, the object will be pushed back to the surface by the centrifugal force.
@voko: What if the object was attached to the Earth? Would you just be pushed back?
Oh yes, when standing on the north pole, Bob should spin with the ball, there's no centrifugal force otherwise.
If there is no friction, why would he?
I don't know, but he can spin at any rate except at zero rate, and still be effected by centrifugal force.
This makes me feel that the story went quite seriuosly wrong though.![]()