CollegeHigh School / Physics

Rotational Inertia

The purpose of this experiment is to find the rotational inertia of a ring and a disk experimentally and to verify that these values correspond to the calculated theoretical values.

A known torque is applied to the pulley on the Rotary Motion Sensor, causing a disk and ring to rotate. The resulting angular acceleration is measured using the slope of a graph of angular velocity versus time. The rotational inertia of the disk and ring combination is calculated from the torque and the angular acceleration. The procedure is repeated for the disk alone to find the rotational inertias of the ring and disk separately.


Student Files

28_Rotational_Inertia.cap 31.20 MB
28_Rotational_Inertia.docx 6.44 MB
28_Rotational_Inertia.pdf 379.46 KB

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PASPORT Rotary Motion Sensor

The PASPORT Rotary Motion Sensor measures position, velocity, and angular and linear acceleration.

Rotational Inertia Accessory

Rotational Inertia Accessory

Add the Rotational Inertia Accessory to a PASCO Rotary Motion Sensor (PS-3220 pr PS-2120) to study rotational inertia of a disk, ring, and point masses.

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Source: Lab #28

Universal 550 Physics Experiment Manual

Rotational Inertia