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Centrifugal force = m v^2/r = m 9.81
I did not know you were still sensitive to the C word I see many examples of its use and have not bothered pointing them out as I thought you were now inured to its use.7.9kms/s the same speed as the gravity train will hit as you pass through the centre of the Earth
For those who don't know what I'm on about, if there actually was such a thing as centrifugal force, a rock spun around on a string would take off at right angles to its former path when you let go of the string. It doesn't. It follows a tangential path.
I thought the reason the rock does not fly off at right angles is because gravity is stronger then the centrifugal force. However should you manage to attach a flea to the surface of the rock with an electronic release device, it will surely fly off at right angles when you get the rock up to speed (I guess that's plain old inertia)!If there is no such thing as centrifugal force then what is happening when someone spins a cycle wheel quickly and you notice resistance when you try to alter the axis it is rotating on?Thanks for having a go at answering the question on zero g at the Earths surface, it puts things into perspective for me that this is even possible...
Quote from: wolfekeeper on 17/03/2012 00:59:48Centrifugal force = m v^2/r = m 9.81But, but, but, there ain'ta no sanity clause, and there ain'ta no centrifugal force either.
the other is a force that exists due to Newton's third law, and is equal and opposite to the centripetal force.
I'm pretty sure half the people on the planet believe that, if gravity stopped working, they would shoot straight up into the air because of "centrifugal" force.
The term centrifugal just means 'towards the center' and it's used in mechanics, for example in bearing design, and helicopters. In roller bearings the rollers create a centrifugal force on the races.
Why do I get the feeling my science education was somewhat lacking in facts and in some cases seems to be more science fiction!