Torsion Pendulum

Consists of an aluminium disc 25 cm diameter. Another small disc of iron c.p having same diameter as the interior of a grooved area of the bigger disc. (The small disc has approx. 8 cm dia and 1.25 cm thickness). A tall U-shape metal bridge with a split chuck, fitted into disc enable accurate suspension and torsion. Article of irregular dimension  as large as brick can also be inserted in the U-Shape suspension.