T=2丌 Where, is the angular velocity of simple harmonic oscillation, and T is the period. So, if period Tand the K are known, the inertia of the rotated object can be expressed as K 4 The additive property of inertia: The moment of inertia of a composite system is the sum of the moments of inertia of its component subsystems(all taken about the same axis) =∑l(=123 Experiment device LED late spindle chopping bardetector aIrscrew sprIn power display ase 5 cycles reset Fig 2 Schematic diagram of the experiment device Procedure Familiarize yourself with the operation of the device. Adjust the device carefully so that it is ready for the measurement(i.e. the base is placed horizontally Determine the torsional constant K of the spiral spring with a plastic cylinder. Employ the theoretically calculated moment of inertia of the plastic cylinder as a known value Measure the moment of inertia of differently shaped objects. Compare the measured results with the theoretically calculated values Optional Verify the parallel axis theore8 K I   (4) 2 T I K   (5) Where,  is the angular velocity of simple harmonic oscillation, and T is the period. So, if the period T and the K are known, the inertia of the rotated object can be expressed as: 2 2 4 K I T   (6) The additive property of inertia: The moment of inertia of a composite system is the sum of the moments of inertia of its component subsystems (all taken about the same axis): ( 1,2,3...) j j I I j    (7) Experiment device Fig. 2 Schematic diagram of the experiment device Procedure  Familiarize yourself with the operation of the device. Adjust the device carefully so that it is ready for the measurement (i.e. the base is placed horizontally.).  Determine the torsional constant K of the spiral spring with a plastic cylinder. Employ the theoretically calculated moment of inertia of the plastic cylinder as a known value.  Measure the moment of inertia of differently shaped objects. Compare the measured results with the theoretically calculated values. Optional  Verify the parallel axis theorem