# Centrifugal Force...

by Cod
Tags: centrifugal, force
 P: 302 Ok, for some reason, I cannot understand exactly how centrifugal force works or the concept behind it. For example, when an Army helicopter is flying through the air and turns, why don't the soldiers slide towards the door or even fall out? Because I know that military choppers do not contain seat belts except in the cockpit. Can someone please explain to me how this happens or why it happens? I know its a newb question, but I'm just starting to enjoy and learn about physics and mathematics. Also, this isn't homework so I'm assuming this is the right forum. So go easy on me [6)].
 P: 179 acceleration is any change in velocity. Velocity has direction as well as magnitude. When the magnitude changes, such as linear acceleration, any massive object will feel a force F = ma. When velocity direction changes, you also have an acceleration. In a circle, this acceleration is a=v2/R, where v is the tangential velocity (if mass were to continue in straight line) and R is distance from center of circle. So then, the force of any circular motion (toward the outside of the circle) will be F = mv2/R. The reason the airmen dont fall out of the chopper is that the friction forces between the men and the seat are greater than the acceleration forces acting to push them around. Also, choppers tend to bank when they turn, directing the total acceleration (componant vector with acceleration of gravity) down into the seat.
 Mentor P: 21,650 Take a yoyo, let it settle all the way at the bottom, then whirl it around in a circle as if the yoyo were orbiting your finger. Feel the force? How about in your car when its turning? ANY curved motion has an associated acceleration causing a centrifugal force. Your helicopter example is a special case. A plane or helicoptor banks at a very specific angle for a specific rate of turn because a plane or helicoptor doesn't fly sideways very well. As a result, the component of the force of gravity pulling the soldiers toward the lower door is exactly balanced by the component of the centrifugal force pushing them towards the other door. Have you ever ridden in a plane? Generally, you won't even know you are turning unless you look out the window.
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## Centrifugal Force...

 Originally posted by russ_watters Take a yoyo, let it settle all the way at the bottom, then whirl it around in a circle as if the yoyo were orbiting your finger. Feel the force? How about in your car when its turning? ANY curved motion has an associated acceleration causing a centrifugal force.