Jan Peter Apel
are vectors, ie they consist of one value and one direction. The
directions are generally ignored. Why? Answer: "One know that, one do
not need to measure that extra!" For real?
1) Straight Acceleration
video shows the
accelerations when starting and then braking a car. The digital display
inside the steering wheel and outwards the trees / bushes at the
roadside indicate the speeds. Within the accelerometer can be seen how the
sensor mass must be accelerated by the measuring spring.
If the sensor mass moes backwards, the acceleration of the car and
the accelerometer is forward.
Movement of sensor mass forward indicates a brake deceleration
The rule for reading this open accelerometer is:
sensor mass, accelerated by the measuring spring, always goes in that
from which the external acceleration force for acceleration acts.
2) Circular Acceleration
shows the accelerations in curves.
you can see, the sensor mass moves outwards. So an acceleration force
acts from the outside inwards to the center of the curve. That's a
surprise, as we believe that a force works from the inside out. And we
even gave this force a name: centrifugal force.
Wrong! There is no centrifugal force!
Although this is known in higher education, bt it has not yet
penetrated to primary schools and their textbook wriders.
a car to be able to make a turn, a force is needed that pushes it
steadily from the outside inwards to the center of the curve. This
force is the centripetal force and arises as friction between the tire
and the road. In the case of black ice, it is almost zero and the car
can not turn.
This centripetal force is the action force, that makes cornering
The centrifugal force is only the reaction force, which one should not
have given any name
3) Vertical Acceleration
Now it is even more
surprising. The accelerometer is aligned vertically
What does it indicate? That gravity moves the sensor mass down. That's
what everybody says, but: Wrong!
The accelerometer is a measuring device. That has no idea in which
direction it measures. It measures accelerations, it can not and may
not do more than that and it does not.
Measuring instruments never lie! If they could, they would no longer be
usable and the entire physics would be on false feet.
What did Einstein say?
He said, that our weight is also arise out of an acceleration. Namely a
Newtonian acceleration, so by an external force to us.
explained it with a person in an elevator cabin, which is accelerated
upwards in the open space from the elevator floor. The human being
feels the same "heaviness" as here on earth. And he added explicitly
that there is no severity wight besides the.acceleration force, which
we only feel as a "gravity heaviness"
Exactly this acceleration from bottom to top measures our and all other
accelerometers. But nobody wants to believe it.
who do not believe measuring instruments should not believe anything at
all, because measured values are the foundation of all physics.
DThat an acceleration acts to us from bottom to top is a fact. To get a
bit closer to this mystery, the following last experiment. We measure
the acceleration in free fall.
4) Gravitational Acceleration
you can see, the accelerometer schows a zero acceleration. The falling
body is not accelerated at all.
also does not act a Newtonian power to the boy. "A falling bodie is
forces-free, so free of acceleration" was Einstein's great insight on
which he built the general theory of relativity. Accelerometers with
the measuring principle by a sensor mass can therefore not measure
gravitational accelerations, only Newtonian's, caused by Newtonian
The measurement results:
acceleration force acts on us from bottom to top
But gravitational accelerations are free of forces, so there is no
attraction at all, at least not as Newtonian force.
the force of attraction as a "non-Newtonian" force is an invention, so
as not to have to admit that one does not know why a body accelerates
in free fall.
All this only clears up when the mystery of gravity is deciphered.
The Newtonian acceleration from bottom to top is
so that we are not fall with the mystery of gravity.
Te cause of gravitation is by no means an attraction force.
Newtonian acceleration upwards is also possible above the ground due to
the recoil force from backpack nozzles or by air masses pushed
downwards by wings.
Einstein is right that bodies on celestial bodies are accelerated from
bottom to top, what they perceive as weight.
he is wrong with his theorie of relativity, because he regarded as a
basis only a force-free body, but not an also movement-free body.