Dear James
I am very grateful to you for attention and very essential criticism.
I agree with you but only in case we will focus attention only on weight - without acceleration.
On mine in this principle the main thing is not weight but inertness and the related acceleration. It is a principle of equivalence of inertia (acceleration) instead of masses.
The principle of equivalence proves that inertia (mass) of a body doesn't depend by nature (content, substance) of that force which affects on it.
I.e. gravitation is just the same force for a body as well as strength of the person or force of explosion of dynamite for example.
It means that gravitation doesn't change mass of a body, but simply gives it acceleration...
Thus, centrifugal acceleration it should be equivalent to rectilinear acceleration.
I use equivalence of accelerations on the basis of equivalence of masses.
Let's remember how Einstein defines an equivalence principle. In my opinion the main thing is equivalence of influence (and its result - accelerations) on weight, instead of the weight.
" A little reflection will show that the law of the equality of the inertial and gravitational mass is equivalent to the assertion that the acceleration imparted to a body by a gravitational field is independent of the nature of the body. For Newton's equation of motion in a gravitational field, written out in full, it is:
(Inertial mass) (Acceleration) (Intensity of the gravitational field) (Gravitational mass).
It is only when there is numerical equality between the inertial and gravitational mass that the acceleration is independent of the nature of the body."