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| Measurement of Gravitational Acceleration Based onSmartphone and Self-made Compound Pendulum
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| ZHANG Shun1,XIAO Shuai2,CAO Jing1 ,YUAN He1,WANG Chun3,LU Xiankui1*,ZHENG Yonggang1 ,LIU Wenguang 1
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Abstract
A mobile phone software that can collect the deflection angle and angular velocity of the mobile phoneis made.Combined with the self-made isometric pendulum , starting from the energy conservation , the self-mademobile app is used to measure the deflection angle and angular velocity of the self-made compound pendulum.Linear fitting is performed on the cosine value of the deflection angle and the square of the angular velocity ,andfinally the value of the gravitational acceleration is obtained by fitting the slope of the straight line.
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Published: 25 October 2022
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Simple Method for Determination of Apparent Densityof Coal and Rock
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