• Period of thread and rod pendulums.
  • Determination of the centre of gravity on a rod pendulum.
  • Reduced pendulum length and centre of inertia of the rod pendulum.


  • Experiments on the oscillation of pendulums, comparison of physical and mathematical pendulums.
  • Rod pendulum (physical pendulum) made of stainless steel, mounted on sliding knife edge bearing.
  • Thread pendulum (mathematical).
  • Additional weight for rod pendulum, can be moved.
  • HDF Base plate for wall mounting.

The apparatus is designed to study the time period and frequency of compound pendulum. A pendulum consists of a cord which has mass at its one end and it is tied to a pivot point on the other end.

The unit consists of a metallic rod on which metallic balls are fitted on different locations. The rod is pivoted at any desired point.