Questions 1. On which factors is the moment of inertia dependent 2. What are the causes that may bring error to our measurement? References 1.沈元华,陆申龙基础物理实验( Fundamental Physics Laboratory)高等教育出版社北 京2004pp.100-103 2.RavitejUppuTorsionalPendulumhttp://www.cmi.ac.in/-ravitej/lab/4-torpen.pdf Appendix: l1 Uncertainty of Plastic cylinder: D&u(Ipr) u(m) (D) D u(D)=√l2(D)+n2(D) l(m)=√x2(m)+2(m Where, uBI(m)=d=0.1g u(D)= ∑(D-D 0.2 n(n-1) g 0.02 [2 Uncertainty of K l(K)= l(c)|a(72-7) 70 Please note: (2-73)=√(2)3+[(7)&7)=27×(T) Since we measure the time of 5 periods, so for each period, we have T==t and ()=√:()+2( ∑ n(n-1) 0.01 √3√3 S9 Questions 1. On which factors is the moment of inertia dependent? 2. What are the causes that may bring error to our measurement? References 1. 沈元华，陆申龙 基础物理实验 (Fundamental Physics Laboratory) 高等教育出版社 北 京 2004 pp. 100-103 2. Ravitej Uppu Torsional Pendulum http://www.cmi.ac.in/~ravitej/lab/4-torpen.pdf Appendix: [1] Uncertainty of Plastic cylinder: 1 1 2 2 2 8 PC I mr mD   & 2 2 ( ) (D) ( ) 2 PC PC u m u u I I m D                 Where, 1 2 2 2 1 2 ( ) ( ) ( ) ( ) 0.1 0.2 ( ) 3 3 B B B B u m u m u m u m d g a u m g       & 2 2 2 2 2 ( ) ( ) ( ) ( ) ( ) ( 1) 0.02 ( ) 3 3 A B i A B u D u D u D D D u D n n a u D mm         . [2] Uncertainty of K. 2 2 2 2 0 2 2 0 ( ) ( ) ( ) PC PC u I u T T u K K I T T                  . Please note: 2 2 2 2 2 2 0 0 u T T u T u T ( ) [ ( )] [ ( )]    & 2 u T T u T ( ) 2 ( )   . Since we measure the time of 5 periods, so for each period, we have 1 5 T t  and 1 ( ) ( ) 5 u T u t  . Where, 2 2 2 2 2 ( ) ( ) ( ) ( ) ( ) ( 1) 0.01 ( ) 3 3 A B i A B u t u t u t t t u t n n a u t s        