# Is Inertial Force not a Real Force ?

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.

Anonymous
Anonymous
On a plane (an inertial frame), three bodies (mass is the same) line up. With strings, bodies on right and left are connected to the body at center. Now, tension acts on two strings. When two bodied does not move, tension is internal force. When two bodied move (in an accelerated motion), tension is external force. And inertial force is acting also. Four tensions each is real force (D'Alembert's principle).

P.S. Inertial resistance will be a resistance of aether.

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
Inertial force is real force : conclusion

Through a spring, force F is pushing body (from the right). Inertial force from the accelerated body is mg. As action and reaction, the two forces are the same (F = mg) and the two are real forces. The spring cannot distinguish two forces.

Inertial forces will be caused by an accelerated motion of a body relative to aether. Bodies are existence in aether. So, there will be no exception qualitative and quantitative. On light sources in air, aether cannot be seen. But everywhere, aether can be seen as inertial forces.

About inertial force, there are respectable web-sites (says that it is real force : in Japanese). So, I do not write further mention.

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
Aether Resistance (writing again)

Probably (differently from air resistance), resistance of aether to a body in a uniform linear motion will be zero. And to a body in a uniform accelerated linear motion, it will be ma.

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
In the picture with a spring posted previously (Jan 21, Jan 25), pushed spring shows only one value. To every observer. Inertial force is a real force.

A value of centrifugal force can be shown with a spring also. On the other hand, Coriolis force is a simple appearance of a locus (not even force).

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
In plural books, a picture shows that a body is hung from the roof of a passenger car. Well, imagine that this hung body touches rear wall, but between the two, a spring is set. When the passenger car moves forward in a uniform acceleration, pushed spring shows only one value. To every observer. F = ma stands up. As action and reaction.

Also imagine, in a room, three strings form letter Y like (it is shown in books).One is hung diagonally from the roof, one is pulled from below with force mg and the other is pulled from side with force ma. Three tensions each is real force. To every observer. As action and reaction.

A web site says, Newton does not deny the reality of inertial force.

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
P.S. to my post (Jan 23)

Inertial force (internal force) is not seen in the body at center. Relativity of acceleration will not stand up.

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
In plural books, a picture shows that from the roof of a passenger car, a body is hung. Well, imagine that this hung body touches rear wall, but between the two, a spring is set. When the passenger car moves forward in a uniform acceleration, pushed spring shows only one value. To every observer. A formula mg = F stands up. As action and reaction.

nakayama
nakayama
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
Inertial force, accelerated motion and changing of momentum three are inseparable. Inertial force is not a fictitious force.

Ufonaut99
Ufonaut99
1) In outer space, force F pushes a body through a spring (F = ma). A force F that pushes buck the spring (inertial force) will be a real force.
2) In a body accelerated by external force, inertial force will occur (in case of gravity, it is not clear). Inertial force will be a real force.
3) Centrifugal force will be a real force.
4) On a body accelerated in a fluid, a normal force and inertial force will occur. The two will be real forces.
>>> Inertial force, accelerated motion and changing of momentum three are inseparable.

And "Changing (inertial) frame" is equally inseperable from those.