PHYS 110_Formal Lab_Exp8_Revisions.docx

# Step 6 changing to the close to furthest distance

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- Step 6: Changing to the close to furthest distance from the vertical rotating shaft. Redo from Step 2 to Step 4, to record the r, m, M, t to fill in the table. - Step 7: Changing to the close to closest distance from the vertical rotating shaft. Redo from Step 2 to Step 4, to record the r, m, M, t to fill in the table. Part II: Varying the Rotating Mass - Step 8: Keep the radius of Step 7, and adding 50g to the mass of the rotating object. Then repeat Step 2 to Step 4, to record the r, m, M, t to fill in the table. - Step 9: Keep the radius of Step 7, and adding 100g to the mass of the rotating object. Then repeat Step 2 to Step 4, to record the r, m, M, t to fill in the table. - Step 10: Use calculator to calculate object’s angular velocity ω , ω 2 , centripetal force F c , Hanging Weight ( Mg ) , and % Diff (Error) F c Mg .

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C e nt ri p et al F or c e ( F c ) 2. Graphs a. Graph (1) between Centripetal Force ( F c = m ω 2 r ) and the radius of rotation ( r ): Radius of the rotation ( r ) b. Graph (2) between the Hanging Weight ( Mg ) and radius of rotation ( r ):

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H a n g i n g W e i g h t ( M g ) Radius of the rotation ( r ) V. Sample Calculations 1. Conversion: a. Converting the Rotating mass 1 from gram (g) into kilogram (kg): 453.20 g = 453.20 1 kg 10 3 g = .45320 kg b. Converting the Radius of rotation 1 from cm into m: 20.50 cm = 20.50 cm× 1 m 10 2 cm = .2050 m c. Converting the Hanging mass 1 from gram (g) into kilogram (kg):

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Adding 50g to Rotating Mass 6.8985 (rad/s) 47.5898 (rad/s) 2 4.1908 (N) 3.4335 (N) 19.86% Adding 100g to Rotating Mass 6.1612 (rad/s) 37.9603 (rad/s) 2 3.6749 (N) 3.3354 (N) 9.69% Based on the data above:
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