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Luigi Fortunati
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Is the force of the stone on the rope "centrifuge"?
Is the force of the stone on the rope "real" or "apparent"?
Is the force of the stone on the rope "real" or "apparent"?
Luigi Fortunati said:Is the force of the stone on the rope "centrifuge"?
Is the force of the stone on the rope "real" or "apparent"?
The strength of the stone on the rope of the sling.PeroK said:What force, what stone, what rope?!
The terms that I learned are "centrifugal" and "fictitious".Luigi Fortunati said:Is the force of the stone on the rope "centrifuge"?
Is the force of the stone on the rope "real" or "apparent"?
jbriggs444 said:The terms that I learned are "centrifugal" and "fictitious".
Centrifugal: Literally meaning "directed away from the center".
Centripetal: Literally meaning "directed toward the center".
Real force: An ordinary physical force. It is present regardless of what reference frame is used. Real forces have third law partner forces.
Fictitious force: A force that is invented to allow Newton's second law to apply in an accelerated or rotating frame of reference. Fictitious forces do not have third law partner forces.
In the case of a stone being whirled in a sling there are three forces that may be considered.
1. Centripetal force. This is the real force of the sling on the stone. It is called "centripetal" simply because it is directed toward the center. https://en.wikipedia.org/wiki/Centripetal_force
2. Centrifugal reaction force. This is the real force of the stone on the sling. It is the third law partner force to the centripetal force. https://en.wikipedia.org/wiki/Reactive_centrifugal_force
3. Centrifugal force. This is the fictitious force. If one adopts a frame of reference that rotates with the sling then the stone is stationary. Yet it is still subject to the real centripetal force. In order to explain how it can remain motionless one invents a "centrifugal force". https://en.wikipedia.org/wiki/Centrifugal_force
By "slingshot", you mean the Y-shaped device with rubber bands that boys use to shoot projectiles? And not the leather strap-and-pouch device that David used to slay Goliath?Luigi Fortunati said:Ok, if I understand correctly, there exists the "real" centrifugal force and there is also the "apparent" centrifugal force.
However, in the case of the slingshot, there are no "apparent" forces, right?
jbriggs444 said:By "slingshot", you mean the Y-shaped device with rubber bands that boys use to shoot projectiles? And not the leather strap-and-pouch device that David used to slay Goliath?
Luigi Fortunati said:However, in the case of the slingshot, there are no "apparent" forces, right?
Luigi Fortunati said:Whirling sligshot, not Y-shaped device
jbriggs444 said:There is indeed an apparent force. It is the centrifugal force on the stone that appears to hold it in place in the sling as it is whirled. It is a fictitious force -- it only appears if we consider the stone to be "in place".
By considering the stone to be "in place", at rest in the sling we have implicitly adopted the rotating frame of reference where the sling is at rest.
jbriggs444 said:There is indeed an apparent force. It is the centrifugal force on the stone that appears to hold it in place in the sling as it is whirled. It is a fictitious force -- it only appears if we consider the stone to be "in place".
By considering the stone to be "in place", at rest in the sling we have implicitly adopted the rotating frame of reference where the sling is at rest.
The force that holds the stone in place against the inward/centripetal force is outward/centrifugal.Luigi Fortunati said:If it appears to "hold it" it is a "centripetal" force, not "centrifugal"!
The force of the stone on the rope is the amount of pull or tension exerted by the stone on the rope. It is typically measured in units of Newtons (N).
The force of the stone on the rope can be calculated using the formula F = m x a, where F is the force, m is the mass of the stone, and a is the acceleration due to gravity (9.8 m/s^2).
Yes, the length of the rope does affect the force of the stone. The longer the rope, the greater the force of the stone due to the increased distance over which the force is applied.
The weight of the stone directly affects the force on the rope. The heavier the stone, the greater the force exerted on the rope.
No, the force of the stone on the rope is not constant. It may change depending on factors such as the movement or acceleration of the stone, the length and weight of the rope, and external forces acting on the rope.