A thin, uniform rectangle, with mass 2.0 kg, length 60 cm and width 40 cm, is...
A thin, uniform rectangle, with mass 2.0 kg, length 60 cm and
width 40 cm, is hung vertically and pivoted about several axes that
are perpendicular to the plane of the rectangle (see diagram). Find
the period of oscillation about each axis. 
Homework Answers
The equation of period of oscillation for a physical pendulum is
Knowing that D is the center of mass of the rectangle and that
the inertia of a rectangular shape is:
(1) in A.
Use Stainer's theorem to find the inertia in the axis that goes through A
(2) in B.
Use Stainer's theoreme to find the inertia in the axis that goes through B
(3) in C.
Use Stainer's theoreme to find the inertia in the axis that goes through C
(4) in D, there is no oscillation because D is the center of mass of the body.
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