This is used to connect the potentiometer to the computer. The potentiometer enables the data to be read in by the difference in voltage read in on the computer. Figure 1 -Sketch of the Apparatus 2. Given that a large symmetric rotating mass with rotational inertia J, is attached to a twisting rod with a torsional spring coefficient K, the following basic relationships can be used to determine the frequency of the system. J is the rotational inertia of the rotating mass.
G is the moment of inertia of the mass.
A is the area, and L is the length of the part to be rotated. Along with these items which need serial number designation, the following items were used. An interface cable was used to get the data from the potentiometer to the computer. A multimeter was used to verify voltages throughout the experiment. A Sargent-Welch Scale was used to pull on the apparatus in order to give the system an initial force.