Don't you have the book College Physics Experiment? Xiangtan University Press, which contains the answer. Firstly, the experimental design requires the rigid body to rotate with uniform angular acceleration; Equipment for measuring instantaneous angular acceleration and angular velocity when steel body rotates: rigid body moment of inertia measuring device, weight meter scale stopwatch, specific steps and the distance from the original weight to the ground, and the time from release to landing of the weight can be measured, the moment of inertia can be determined, the angular acceleration can be determined, and the instantaneous angular acceleration can be forgotten during the experimental period. O(∩_∩)O Thank you.