{"id":2100,"date":"2024-07-04T14:52:43","date_gmt":"2024-07-08T11:08:49","guid":{"rendered":"https:\/\/experiments.school\/?post_type=product&p=2100"},"modified":"2024-07-26T10:27:10","modified_gmt":"2024-07-26T08:27:10","slug":"212-propulsion-by-recoil","status":"publish","type":"product","link":"https:\/\/experiments.school\/en\/product\/212-propulsion-by-recoil\/","title":{"rendered":"212 – Propulsion by recoil"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

Boat with water propulsion\u00a0\u00a0<\/strong><\/h2>\n

Rocket principle\u00a0\u00a0<\/strong><\/h2>\n

 <\/p>\n

Introduction to:\u00a0<\/span>\u00a0<\/span><\/h2>\n
    \n
  • Conservation of momentum\u00a0<\/span>\u00a0<\/span><\/li>\n
  • Recoil\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n[video width=\"1920\" height=\"1080\" mp4=\"https:\/\/experiments.school\/wp-content\/uploads\/2024\/07\/212-viedeo-end.mp4\" poster=\"https:\/\/experiments.school\/wp-content\/uploads\/2024\/07\/212-Vorschaubild.jpg\"][\/video]\n

     <\/p>\n

    Material:\u00a0<\/span>\u00a0<\/span><\/h2>\n
      \n
    • Food storage box made of polystyrene \/ plastic plate<\/span><\/li>\n
    • Cups (light, e.g. polystyrene cups, plastic cups)\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Straw\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Glue \/ Hot Glue (optional)<\/span><\/li>\n
    • Scissors \/ Drills\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Vessel with water\u00a0<\/span>\u00a0<\/span><\/li>\n
    • Tub with water \/ natural water surface\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

      Setup:\u00a0<\/span>\u00a0<\/span><\/h2>\n
        \n
      • Use the scissors to drill a hole the diameter of the straw on the side of the lower part of the cup\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Glue the straw into the hole\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Drill a hole in the side of the food storage box and pass the straw through it\u00a0<\/span>\u00a0<\/span><\/li>\n
      • Glue the straw into the hole<\/span><\/li>\n<\/ul>\n

        Execution:<\/span>\u00a0<\/span><\/h2>\n
          \n
        • Put the boat in the tub of water\u00a0<\/span>\u00a0<\/span><\/li>\n
        • Carefully fill the cup halfway with water\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

          Observation:\u00a0<\/span>\u00a0<\/span><\/h2>\n
            \n
          • The water flows from the cup through the straw into the tub\u00a0<\/span>\u00a0<\/span><\/li>\n
          • The boat accelerates in the opposite direction\u00a0<\/span>\u00a0<\/span><\/li>\n<\/ul>\n

            Explication:\u00a0<\/span>\u00a0<\/span><\/h2>\n
              \n
            • Due to the pressure at the bottom of the cup, the outflowing water receives an impulse, backwards<\/span>\u00a0<\/span><\/li>\n
            • Due to the conservation of momentum, an opposite impulse is created on the boat, forward (recoil)<\/span><\/li>\n<\/ul>\n

              Didactic note:\u00a0<\/span>\u00a0<\/span><\/h2>\n
                \n
              • The propulsion system works on the same principle as a rocket<\/span><\/li>\n<\/ul>\n","protected":false},"featured_media":2102,"template":"","meta":[],"product_brand":[],"product_cat":[905,912,924,927,858,882],"product_tag":[],"class_list":{"0":"post-2100","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-3-pressure-buoyancy","7":"product_cat-4-velocity-acceleration-inertia","8":"product_cat-8-momentum-conservation-of-momentum","9":"product_cat-9-energy-forms-conservation-of-energy","10":"product_cat-a-mechanics","11":"product_cat-j-physics-of-the-kitchen","12":"","13":"woocommerce-text-align-left","14":"woocommerce-image-align-center","16":"first","17":"instock","18":"shipping-taxable","19":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/product\/2100","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/media\/2102"}],"wp:attachment":[{"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/media?parent=2100"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/product_brand?post=2100"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/product_cat?post=2100"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/experiments.school\/en\/wp-json\/wp\/v2\/product_tag?post=2100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}