{"id":2064,"date":"2024-06-23T13:37:48","date_gmt":"2024-06-23T11:40:33","guid":{"rendered":"https:\/\/experiments.school\/?post_type=product&p=2064"},"modified":"2024-06-23T13:40:33","modified_gmt":"2024-06-23T11:40:33","slug":"027-fusee-en-ballon","status":"publish","type":"product","link":"https:\/\/experiments.school\/fr\/produkt\/027-fusee-en-ballon\/","title":{"rendered":"027 – Fus\u00e9e en ballon"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

Propulsion par l\u2019air sortant\u00a0\u00a0<\/strong><\/h2>\n

\u00a0<\/span><\/p>\n

Introduction \u00e0 :\u00a0<\/span>\u00a0<\/span><\/h2>\n
    \n
  • Principe de recul<\/span>\u00a0<\/span><\/li>\n
  • Principe d\u2019interaction<\/span>\u00a0<\/span><\/li>\n
  • 3\u00e8me Loi de Newton, \u00ab\u202f<\/span>actio<\/span>\u202f\u00bb et \u00ab\u202f<\/span>reactio<\/span>\u202f\u00bb<\/span><\/span>\u00a0<\/span><\/span><\/li>\n
  • Conservation de la quantit\u00e9 de mouvement <\/span>\u00a0<\/span><\/li>\n<\/ul>\n[video width=\"1920\" height=\"1080\" mp4=\"https:\/\/experiments.school\/wp-content\/uploads\/2024\/06\/027-video-miguel-end.mp4\"][\/video]\n

     <\/p>\n

    Mat\u00e9riel:\u00a0<\/span>\u00a0<\/span><\/h2>\n
      \n
    • Ballon\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Paille (aussi \u00e9paisse que possible)\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Cordon fin et lisse \/ fil r\u00e9sistant \u00e0 la d\u00e9chirure \/ fil (2-5 m\u00e8tres)\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Ruban adh\u00e9sif\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Ciseaux\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Pince \u00e0 linge\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

      Montage:<\/span>\u00a0<\/span><\/h2>\n
        \n
      • Gonflez compl\u00e8tement le ballon\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Maintenez-le ferm\u00e9 avec vos doigts et tournez dans la sortie pour emp\u00eacher l\u2019air de s\u2019\u00e9chapper\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Fermez la prise avec une pince \u00e0 linge\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Coupez un morceau de paille d\u2019environ 5 \u00e0 10 cm de long.\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Fixez-le au ballon longitudinal avec beaucoup de ruban adh\u00e9sif pour que la sortie soit <\/span>dans la m\u00eame direction<\/span><\/b> !\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Enfilez la ficelle dans la paille\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Attachez la ficelle \u00e0 deux chaises ou autres meubles aux deux extr\u00e9mit\u00e9s. Une poign\u00e9e de porte est \u00e9galement bien adapt\u00e9e.\u00a0\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Il peut y avoir plusieurs m\u00e8tres ou m\u00eame toute la pi\u00e8ce entre les deux.<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

        Ex\u00e9cution:\u00a0<\/span>\u00a0<\/span><\/h2>\n
          \n
        • Retirez la pince \u00e0 linge et maintenez le ballon ferm\u00e9 avec vos doigts.<\/li>\n
        • Amenez-le \u00e0 la position de d\u00e9part et rel\u00e2chez-le.<\/li>\n<\/ul>\n

          Observation:\u00a0<\/span>\u00a0<\/span><\/h2>\n
            \n
          • L\u2019air s\u2019\u00e9coule bruyamment de la sortie et le ballon siffle le long de la corde. Ce faisant, il atteint une vitesse remarquable.\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

            Conseils:\u00a0<\/span>\u00a0<\/span><\/h2>\n
              \n
            • M\u00eame sans ficelle, le lancement d\u2019une fus\u00e9e ballon est une tentative \u00e0 main lev\u00e9e raisonnable.\u00a0<\/span>\u00a0<\/span><\/li>\n
            • Un ballon allong\u00e9 est particuli\u00e8rement adapt\u00e9.\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

              Explication:\u00a0<\/span>\u00a0<\/span><\/h2>\n
                \n
              • La peau tendue du ballon augmente la pression \u00e0 l\u2019int\u00e9rieur, de sorte que la diff\u00e9rence de pression \u00e0 la sortie pousse l\u2019air hors du ballon et acc\u00e9l\u00e8re dans le processus. <\/span><\/li>\n
              • Selon <\/span>la troisi\u00e8me loi de Newton<\/span><\/b>, cette force d\u2019acc\u00e9l\u00e9ration g\u00e9n\u00e8re une force oppos\u00e9e et \u00e9gale sur le ballon, qui l\u2019acc\u00e9l\u00e8re dans la direction oppos\u00e9e. <\/span><\/li>\n
              • Le ballon subit un<\/span> recul<\/span><\/b>. Une<\/span> fus\u00e9e<\/span><\/b>, un moteur \u00e0 r\u00e9action ou la locomotion d\u2019une m\u00e9duse fonctionnent sur le m\u00eame principe.\u00a0<\/span>\u00a0<\/span><\/li>\n
              • L\u2019air sortant re\u00e7oit une impulsion, le ballon re\u00e7oit la m\u00eame impulsion dans la direction oppos\u00e9e <\/span>(loi de conservation de la quantit\u00e9 de mouvement)<\/span><\/b>.<\/span>\u00a0<\/span><\/li>\n<\/ul>\n","protected":false},"featured_media":2078,"template":"","meta":[],"product_brand":[],"product_cat":[908,913,925,928,699],"product_tag":[],"class_list":{"0":"post-2064","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-3-pression-poussee-darchimede","7":"product_cat-4-vitesse-acceleration-inertie","8":"product_cat-8-impulsion-conservation-de-limpulsion","9":"product_cat-9-formes-denergie-conservation-de-lenergie","10":"product_cat-a-mecanique","11":"","12":"woocommerce-text-align-left","13":"woocommerce-image-align-center","15":"first","16":"instock","17":"shipping-taxable","18":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product\/2064","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/media\/2078"}],"wp:attachment":[{"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/media?parent=2064"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product_brand?post=2064"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product_cat?post=2064"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/experiments.school\/fr\/wp-json\/wp\/v2\/product_tag?post=2064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}