000078974 001__ 78974
000078974 005__ 20200117221602.0
000078974 0247_ $$2doi$$a10.1088/1361-6404/aab98b
000078974 0248_ $$2sideral$$a105993
000078974 037__ $$aART-2018-105993
000078974 041__ $$aeng
000078974 100__ $$aGomes, Mário S.M.N.F.
000078974 245__ $$aThe 'spinning disk touches stationary disk' problem revisited: an experimental approach
000078974 260__ $$c2018
000078974 5060_ $$aAccess copy available to the general public$$fUnrestricted
000078974 5203_ $$aA popular Newtonian mechanics problem, featured in textbooks, physics olympiads and forums alike, concerns two disks with different radii and moment of inertia that rotate differently and that touch each other. Most students struggle to calculate the final angular velocity of the disks, erroneously attempting to use different conservation laws. In this paper we propose a simple experiment that should help physics teachers explain this challenging exercise in an engaging way for the students. By using a smartphone/tablet and video analysis tools, the angular velocity of both disks can easily be tracked as a function of time, clearly showing the three stages of the interaction (before touching, only one disk rotating; touching with slippage; and touching without slippage). Processing and plotting of the data in a spreadsheet immediately shows which quantities are conserved and which are not. Several extensions to the core experiment are also suggested.
000078974 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000078974 590__ $$a0.861$$b2018
000078974 591__ $$aPHYSICS, MULTIDISCIPLINARY$$b64 / 81 = 0.79$$c2018$$dQ4$$eT3
000078974 591__ $$aEDUCATION, SCIENTIFIC DISCIPLINES$$b34 / 41 = 0.829$$c2018$$dQ4$$eT3
000078974 592__ $$a0.441$$b2018
000078974 593__ $$aPhysics and Astronomy (miscellaneous)$$c2018$$dQ2
000078974 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000078974 700__ $$0(orcid)0000-0003-2713-2786$$aMartín-Ramos, Pablo$$uUniversidad de Zaragoza
000078974 700__ $$aPereira da Silva, Pedro S
000078974 700__ $$aRamos Silva, Manuela
000078974 7102_ $$15011$$2500$$aUniversidad de Zaragoza$$bDpto. CC.Agrar.y Medio Natural$$cArea Ingeniería Agroforestal
000078974 773__ $$g39, 4 (2018), 045709 [9 pp.]$$pEur. j. phys.$$tEUROPEAN JOURNAL OF PHYSICS$$x0143-0807
000078974 8564_ $$s1023663$$uhttps://zaguan.unizar.es/record/78974/files/texto_completo.pdf$$yPostprint
000078974 8564_ $$s100106$$uhttps://zaguan.unizar.es/record/78974/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000078974 909CO $$ooai:zaguan.unizar.es:78974$$particulos$$pdriver
000078974 951__ $$a2020-01-17-21:43:48
000078974 980__ $$aARTICLE