ERIC Number: EJ1217231
Record Type: Journal
Publication Date: 2018
Pages: 15
Abstractor: As Provided
ISBN: N/A
ISSN: EISSN-1309-7202
EISSN: N/A
Conical Pendulum Part 3: Further Analysis with Calculated Results of the Period, Forces, Apex Angle, Pendulum Speed and Rotational Angular Momentum
Dean, Kevin
European Journal of Physics Education, v9 n2 p14-28 2018
The conical pendulum provides a rich source of theoretical and computational analysis and the present work presents a seamless continuation of the previous publication. The tension force F[subscript T] and centripetal force F[subscript C] are explored further in linearization analyses and the appropriate slopes are explained. A similar analysis is applied to the period as a visual confirmation of the expected linearity and the slope is explained. The apex angle is considered as a function of both the conical pendulum period and angular speed. An analysis is presented of the conditions required for the constancy of the length of the adjacent side of the triangle defining the conical pendulum, which gives rise to an apparently counter-intuitive result and this is explained in detail. The speed of the rotating conical pendulum mass is calculated as a function of the radius and also as a function of the apex angle. The rotational speed is then used in order to calculate the rotational angular momentum. In order to maintain continuity of calculations from the previous work, the length range of the conical pendulum was maintained to be 0.435 m = L = 2.130 m, the local acceleration due to gravity g = 9.789 ms[superscript -2] and with a mass m = 0.1111 kg. This required the same limits for the string tension of approximately mg = F[subscript T] = 12 N, the calculations therefore covered an apex angular range from zero (string hanging vertically down) up to 85°. [For Part 1, "Conical Pendulum--Linearization Analyses," see EJ1174583. For "Conical Pendulum: Part 2. A Detailed Theoretical and Computational Analysis of the Period, Tension and Centripetal Forces," see EJ1217093.]
Descriptors: Science Instruction, Physics, Motion, Scientific Concepts, Graphs, Equations (Mathematics), Mechanics (Physics)
Erciyes University. Melikgazi, Kayseri, 38039 Turkey. Tel: +90-352-207-6666; Web site: http://www.eu-journal.org/index.php/EJPE
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A