Η γεωμετρική αναφορά της έννοιας ΣΤΡΟΦΟΡΜΗ

σε ορισμένα βιβλία

G. D. Frier UNIVERSITY PHYSICS (1965)

If a set of axes at O is not accelerated… multiplied by the perpendicular distance from O to the line of motion gives the angular momentum. (p.67)

Arfken – Griffing, UNIVERSITY PHYSICS (1984)

For a particle having linear momentum p located at the point Q with POSITION VECTOR r we define the angular momentum vector, L, by the equation L = r x p (p.213)

F. Blatt PRINCIPLES OF PHYSICS (1987)

For symmetrical systems L has the same direction as ω. (p.152)

R.P.Olenick, Tom M.Apostol, D.L.Goldstein PRINCIPLES OF PHYSICS (1985)

In the general definition of angular momentum, the vector r starts from some REFERENCE POINT O to the position of the particle of mass m and THE ANGULAR MOMENTUM IS SAID TO BE ABOUT O. (p. 441)

Robert Resnick- David Halliday ( 1966)

Angular momentum of a particle

Consider a particle of mass m and momentum p at a position r relative to the origin O of an inertial reference frame. We define the angular momentum L of the particle WITH RESPECT TO THE ORIGIN O to be l=r x p (page 263)

L = Iω. THIS IS A SCALAR relation holding for the rotation of a rigid body about the fixed axis. L IS THE COMPONENT -ALONG THE AXIS- OF THE VECTOR ANGULAR MOMENTUM, OF THE RIGID BODY and I must refer to that same axis.

It (the equation) gives the angular momentum ABOUT A FIXED AXIS of a rigid body having rotational inertia I and angular speed ω about the same axis. (page 281)