A blue sky, with the WHAT_IS_INERTIA website title

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What-is-inertia.info is part of the Gravimotion websites family.
Gravimotion is a logical (not philosophical) alternative to theoretical physics.
Gravimotion's main feature is to make sense!

Please forgive, when awkward, the English of this page. English is not the author's native language.
Average Reading Time: 2 minutes 20 seconds

The inertia law or Newton's first law

Any object in the state of rest or in the state of uniform motion, remains at rest or in uniform motion, unless acted upon by an unbalanced force.

The inertia law is in conflict with constant spin

A spinning object such as a top or the earth is not in uniform motion, because it constantly changes direction.
As such constant spinning is not taken care of by the inertia law, even though it is inertia that maintains constant spinning!

Note that due to friction the spinning of the toy is slowed down and actually not constant. Similarly due to the moon, which causes the tides, Earth’s spin is slowed down through friction of water flows. Friction though, and not inertia, causes the slowing. Inertia is a heavy weight in physics!

Physics solution

In order to comply with nature, physicists created a new law differing from the inertia law!
The new law involves angular speed, angular momentum and rotational inertia!

The duality of inertia (in physics)

These angular and rotational entities were specifically invented because constant spin is not taken care of by the inertia law.
Clearly, should the inertia law describe constant spin, these new mathematical entities would not be needed!
Now there are two drastically differing mathematical descriptions of inertia in physics.
For accuracy the rotational inertia has been invented by analogy to the inertia law.

The one-ness of inertia (in reality)

Inertia
is integral part
of motion,
in Gravimotion...

Read all about Gravimotion!
 
Click and get the book!

We can only imagine the reality of inertia as being one.
As a matter of fact physicists did not invent a new word to label the inertia that maintains constant spin.
Physicists only gave it the rotational adjective.
There is only one inertia in Reality.

Inertia's mathematical duality might be physics' biggest blunder

Borrowing Einstein’s famous word, because inertia (along mass) is at the base of all of physics, physics' duality of inertia is a blunder!
The whole mathematical edifice of physics is now based on two differing pillars the duality of which compromises the unity of any subsequent buildup no matter how elaborate or clever!

The controversy doesn't compromise the respect we have for physics

This web-page is based on the belief that the unity of Nature can only be explained in a united way.
Physics, which goal is to describe doesn't have to comply, even though the aspiration is to get to a Grand Unified Theory.
The fact of the matter is physics’ description of reality remains exquisitely accurate.

There is at least one solution to the inertia dilemma: the Gravimotion mechanism!

The Gravimotion mechanism is described in great details in the book pictured on your right.
In the gravimotion interpretation of Nature inertia is redesigned as being integral part of motion.
Furthermore instead of being inert, inertia is alive in (our human concept of) time.
And because motion is one, inertia is one!
Once through this book, physics' concept of inertia will look clumsy and antiquated to you...
Inertia is integral part of motion in the gravimotion mechanism!

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