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Is Inertial Force not a Real Force ?

January 21 2017 at 11:58 PM
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.

 
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Anonymous

Re: Is Inertial Force not a Real Force ?

January 23 2017, 12:28 AM 

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

Re: Is Inertial Force not a Real Force ?

January 25 2017, 1:28 AM 

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

Re: Is Inertial Force not a Real Force ?

January 27 2017, 12:14 AM 

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

Re: Is Inertial Force not a Real Force ?

January 28 2017, 12:23 AM 

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

Re: Is Inertial Force not a Real Force ?

January 30 2017, 12:10 AM 

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

Re: Is Inertial Force not a Real Force ?

January 31 2017, 12:57 AM 

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

Re: Is Inertial Force not a Real Force ?

February 1 2017, 11:34 PM 

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

Re: Is Inertial Force not a Real Force ?

February 16 2017, 11:30 PM 

Inertial force, accelerated motion and changing of momentum three are inseparable. Inertial force is not a fictitious force.

 
 
Ufonaut99

Re: Is Inertial Force not a Real Force ?

February 16 2017, 11:41 PM 

>>> Inertial force, accelerated motion and changing of momentum three are inseparable.

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

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

February 22 2017, 1:32 AM 

Inertial force caused by external force (except gravity) or by rotation can be calculable with internal force. Inertial force caused in a body falling vertically in a stationary fluid can be calculable from gravity and fluid resistance (of every moment). In the same gravitational field, in free fall, fluid resistance is zero.

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

February 23 2017, 11:45 PM 

From the roof of a passenger car, a body is hung. The passenger car increases acceleration to the right and the string hanging the body now shows 45 degrees angle. It means that gravity and inertial force are equalized (inertial force is caused by "aether resistance" that resists acceleration). The two can be actions and the tension of the string can be reaction. Inertial force is a real force (as an action on the potential energy also).

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

March 1 2017, 12:32 AM 

On the floor of a passenger car, the same five bodies form a line. Between the first body and the right wall, and between five bodies are joined with strings. Now, the passenger car starts a uniform accelerated motion to the right. Friction of the floor is supposed to be zero and mass of strings to be zero also. Tension of the first string will be 5ma and the last string will be 1ma (when acceleration is double, 10ma and 2ma). It will be the same to every observer. Inertial force is a real force.

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

March 3 2017, 1:11 AM 

In a uniform accelerated motion (ideal), both sides of F = ma continue constantly. Acceleration a continues constantly also. Namely, action and reaction are equal and the body is accelerated. An equal sign assures that inertial force is a real force.

P.S. How valid is F = ma in actual situation ? It seems not to be certain. The certain thing is that inertial force is ma always and is a real force.

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

March 16 2017, 2:33 AM 

On a disk rotating horizontally, centrifugal force is acting. Our image of centrifugal force is a force acting on a line that heads outward from the center. But probably, on the disk (at every point), the same two forces (drawing) will be acting from the both sides in the arc direction. This force (caused by centrifugal force) is an inertial force and is a real force also (just like centrifugal force).

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

March 20 2017, 2:03 AM 

In rotational motion, inertial force (centrifugal force) will be measurable easily by internal force. In non-gravitational field, inertial force will be measurable reliably by internal force (On the earth surface also. But the internal force is horizontal direction only). Inertial force is a real force.

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

April 4 2017, 12:48 AM 

In a formula F = ma, on F (force), two interpretations (force as output and force as input) seems to be possible. On force output, the formula (ma = F) stands up always. But, how about force input ?

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

April 19 2017, 12:42 AM 

Inertial force is considered to be fictitious force. About its reason, a web site says that if the external force and inertial force are the same, a body cannot accelerate. Is it a common view ? This view is incompatible with a formula F = ma. Now, a force F is acting on a body. Whether the body accelerates or not, action and reaction will be the same. Formula F = ma will be F = ma + X (case ma is zero and case X is zero)

In a formula F = ma, if F is an invariant (m will be so also), term a will be an invariant also. Aether frame will be a real existence.

 
 
Anonymous

Re: Is Inertial Force not a Real Force ?

April 19 2017, 6:18 AM 

True!

 
 
nakayama

Re: Is Inertial Force not a Real Force ?

April 23 2017, 9:40 PM 

Acceleration is indicated by accelerometer. Namely, acceleration cannot be relative (on rotating motion, it is more evident).

 
 
 
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