{"id":1345,"date":"2017-03-21T16:50:47","date_gmt":"2017-03-21T15:50:47","guid":{"rendered":"http:\/\/agora.xtec.cat\/insdecaldes\/?p=1345"},"modified":"2017-03-22T09:43:59","modified_gmt":"2017-03-22T08:43:59","slug":"construccio-dun-dinamometre","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inspicdelvent\/portada\/construccio-dun-dinamometre\/","title":{"rendered":"Construcci\u00f3 d’un dinam\u00f2metre"},"content":{"rendered":"

Els alumnes de 2n ESO hem constru\u00eft un dinam\u00f2metre per trobar la relaci\u00f3 que hi ha entre la for\u00e7a aplicada i l’allargament.<\/p>\n

Hem fet servir una cartolina, cinta adhesiva, tisores, una molla, pedres, una balan\u00e7a i un regle.
\nEn primer lloc, hem fet una capseta de cartolina que la farem servir com un cistellet, on introduirem les pedres, la penjarem a la molla i anotarem quant s’allarga la molla.<\/p>\n

Seguidament pesarem les pedres i calcularem el pes. Finalment representarem l’allargament i el pes. Ens vam adonar que la representaci\u00f3 era una recta, amb la qual cosa podem concloure que aquestes dues magnituds s\u00f3n directament proporcionals i obeeixen la llei de Hooke.<\/p>\n

Us deixem unes imatges de la construcci\u00f3 del nostre dinam\u00f2metre.<\/p>\n\r\n\t

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