The Torsion
Pendulum is an interesting example of simple harmonic motion, often overlooked
by students. It is helpful in explaining the meaning of moment of inertia and
moment of torsion and how they affect the period of vibration. The one end of
suspension wire hangs from a universal clamp with the help of a chuck nut and
the other end is clamped to a solid metal disc of 12.5 cm dia and 1.25 cm thick
with the help of a chuck nut. A heavy metal ring of the same metal and the same
outside diameter as the disc is included. When ring is placed on the disc, the
moment of inertia, and therefore the period of the system is increased.
Supplied with universal clamp.
