centrifugal force
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AI overview
Centrifugal force is an inertial force that appears to push objects outward when something is rotating, even though it's not a real force pushing from the outside. It matters because it helps us describe and predict the motion of rotating objects from the perspective of someone spinning along with them, making calculations easier in rotating reference frames.
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Article
Riders on a swing carousel interpret the cessation of upward motion as a balancing of the force of gravity, the force of the tension of the chains, and a centrifugal force pushing them away from the center of rotation. A stationary observer on the ground observes uniform circular motion, which requires a net centripetal force that is the combination of the force of gravity and the force of the tension of the chains.
In Newtonian mechanics, a centrifugal force is a kind of fictitious force (or inertial force) that appears to act on all objects when viewed in a rotating frame of reference. It appears to be directed perpendicularly from the axis of rotation of the frame. The magnitude of the centrifugal force F on an object of mass m at the perpendicular distance ρ from the axis of a rotating frame of reference with angular velocity ω is