3.2.5　Data recording and processing

3.2.5　Data recording and processing

1)Determine the moment of inertia J

Record observations in Table 3.2.1 and Table 3.2.3.Table 3.2.2　Measurement of angular acceleration of metal disk added the test body

Table 3.2.1　Measurement of angular acceleration of the empty test table

2)Verify the parallel axis theorem.

Record observations in Table 3.2.3.

Table 3.2.3　Measurement of angular acceleration of test table with two symmetrically added solid cylinders

(https://www.daowen.com)

3)Experimental data processing

(1)Calculate the moment of inertia of the empty test table J1=　kg·m2.

(2)Calculate the moment of inertia of test table with added hollow cylinder J2=　kg·m2.

(3)Calculate the moment of inertia of the hollow cylinder J3=　kg·m2.

(4)Calculate the moment of inertia of test table with two symmetrically placed cylinders J2=　kg·m2.

(5)Calculate the moment of inertia of the two cylinders,whose axes parallel to the axis through the center of test table,J3=　kg·m2.

(6)Calculate the relative error of the moment of inertia of the test body and verify the parallel axis theorem.

4)Tips and attentions

Two or three data before and after the cut-off point of acceleration and deceleration should be eliminated.