• Moment of inertia is a physical quantity for the representation of the inertial amount of a rotational object.
• It is dependent on the mass distribution and the shaft position of the rigid body.
• This apparatus uses the three-string pendulum method to determine the moment of inertia of a rigid body.
• A photoelectric sensor combined with a time counting device is used to measure the torsional oscillation period of a hanging plate.
• Through the experiments, students can understand the physical principle of the moment of inertia and learn the measurement method with factors related to the amount of moment of inertia.
• Using this apparatus, the following experiments can be conducted

Measure the moment of inertia using the three-string pendulum method.

Measure the moment of inertia of two objects of same mass but with different mass distribution.

Verify the parallel axis theorem of moment of inertia.