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Study on the nonlinear characteristic of pendulum

LIU Zheng-cheng;LI Qing-song;SUN Ying-chun;School of Plysics,Northeast Normal University;National Demonstration Center for Experimental Physics Education,Northeast Normal University;  
The angles and periods were exactly measured by experiments in the case of large-angle pendulum.On the other hand,the pendulum kinetic equation was solved by using Matlab.By analyzing and comparing the simulation results with the experimental data,it was proved that large-angle pendulum was typical nonlinear.
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