3B Scientific Torsion Axle - Manual (Page 4)

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tween the rotation axis and the axis of the centre
of gravity.
• Re-adjust the horizontal alignment of the disc
after each change of distance a.
• Form the ratios
=
−
2
0 a
a
J J
constant
Thus Steiner’s theorem
2
0 a
ma J J
+ =
is verified.
Fig. 7 Verification of Steiner’s theorem