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quote:Originally posted by BassSince I study rocks and know just enough physics to be dangerous- I'm still trying to figure this out. Is there a separate centripetal force? It seems that in orbitting celestial bodies it is actually gravity, or the tension in a string when whirling a rock about your head, or the reaction force of the road against your tires as you squeal around a turn?Is centrifugal force really a measure of the change in inertia? When I whirl a rock around my head and let go, it travels at a tangent to it's circular motion (perpendicular to the radius at the point it is let go). If centrifugal force actually exists, shouldn't it travel directly away from the center of rotation?Prediction is difficult, especially the future. -Niels Bohr
quote:Originally posted by gsmollinThe centripetal force is the force accelerating the rock towards you, in the center who are whirling it about you. This force has a magnitude equal to the tension in the string, and a rotating direction that always points at you in the center. Centrifugal force is the reaction force that you feel on the other end of the string, which seems to be pulling the rock away from you. If you let go of the string, the rock flies off in a straight line, since the centripetal force is now zero.
quote:Originally posted by UltimaIf there was only a force acting on the rock towards the centre it wouldn't stay in a circle, it would just accelerate inwards.wOw the world spins?
quote:Originally posted by UltimaThe reaction against the side of the bowl is what is keeping the eggs in a circular motion. And you are applying a force outwards on the egg with the whisk, so when the bowl isn't there you get egg on your face! I like my eggs.. hatched!wOw the world spins?
There was this ride at the fair I went to and there was this massive kind of circle thingy with a cage around it.You just had to stand up in it and the ride went nearly right up on it's side and everything while spinning. You weren't strapped in or anything. Is this a result of centrifugal force?----------------------Time is like a knife..... slowly and relentlesly.... cuts the cored of life.-__- my website!!!!...sorry, you cannot view external links. To see them, please
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Does centrifugal force actually exist- that is, is there actually a force that pushes objects away from a center of rotation?
Centripetal force is a force that makes a body follow a curved path; it is always directed orthogonal to the velocity of the body, toward the instantaneous center of curvature of the path. The term centripetal force comes from the Latin words centrum ("center") and petere ("tend towards", "aim at"), signifying that the force is directed inward toward the center of curvature of the path.