到仪器转轴的距离来改变系统的转动惯量，使得总转动惯量可以在较大的范围内改变，并且始终保持了系统质量的对称性分

布，从而有效地减小了实验的相对误差，提高了实验结果的可信度.

is introduced. In the new scheme，the moment of inertia of the whole system is changed by changing the distance of

the steel pillars to the instrument rotational axis symmetrically. The variation of moment of inertia is made in a large

range and the symmetrical mass distribution is preserved. So that the relative error is significantly reduced and the

reliability of the verification of the theorem is substantially improved.