Geodesic
On the motion of a body suspended on a thread with variable length
Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory, Proceedings of the International Conference "Geometric Methods in Control Theory and Mathematical Physics" dedicated to the 70th anniversary of S.L. Atanasyan, the 70th anniversary of I.S. Krasilshchik, the 70th anniversary of A.V. Samokhin, and the 80th anniversary of V.T. Fomenko. S.A. Esenin Ryazan State University, Ryazan, September 25–28, 2018. Part 1, Tome 168 (2019), pp. 99-104

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In this paper, we consider the motion of a body suspended on a thread of variable length. We obtain expressions for the speed of the flexible thread when it is wound on a drum, the angular velocity of the drum, and the total duration of the process.
Mots-clés : particle, rotation angle
Keywords: flexible thread, angular velocity, pneumatic motor. 
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     title = {On the motion of a body suspended on a thread with variable length},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
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     volume = {168},
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V. M. Ulyanov; A. Yu. Kiryanov; V. A. Khripin. On the motion of a body suspended on a thread with variable length. Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory, Proceedings of the International Conference "Geometric Methods in Control Theory and Mathematical Physics" dedicated to the 70th anniversary of S.L. Atanasyan, the 70th anniversary of I.S. Krasilshchik, the 70th anniversary of A.V. Samokhin, and the 80th anniversary of V.T. Fomenko. S.A. Esenin Ryazan State University, Ryazan, September 25–28, 2018. Part 1, Tome 168 (2019), pp. 99-104. http://geodesic.mathdoc.fr/item/INTO_2019_168_a11/