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【德國Moses】小科普-夜光迴旋鏢

NT $278.00
NT $250.00


迴旋鏢是一種經典的戶外運動遊戲,它在空中飛行後,會再次回到你手上,這就是它不退流行的原因。另一方面它令小科學家著迷的原因,就是有空氣力學的作用在其中,它飛行時,空氣在它的翅膀周圍流動,利用周圍氣流上下盤旋,使其以曲線飛行。 ● 聚丙烯材質,輕盈好抓握 ● 夜光特性,吸光後會在黑暗中發光 ● 藉由使用迴旋鏢理解「空氣力學」原理     黑暗中的軌跡具夜光效果在黑暗中劃出美麗的圖案高質感曲線聚丙烯材質,輕盈靈活完美曲線易於抓握 空氣動力學利用物理原理飛出特殊飛行曲線在戶外盡情享受迴旋飛鏢的魅力空氣動力學(Aerodynamics)是流體力學與氣體動力學的一個分支,主要研究物體在空氣中運動時所產生的各種力。迴旋鏢(Boomerang)又稱回飛棒、飛旋鏢、迴力鏢,曾經是澳洲原住民的一種打獵工具,利用物理原理飛出特殊飛行曲線,近年在歐美國家發展成體育比賽項目。迴旋鏢的原理,是因為他本身是3個類似飛機機翼的結構,流體流速愈慢,壓力愈大。通過葉片下方氣流流速慢壓力大,因此葉片受到向上升力,此為伯(白)努力原理。迴旋鏢葉片一面是凸面,一面是平面,當迴旋鏢飛時,氣流會流過葉片,空氣通過凸面的距離長於平面,所以通過平面的空氣流速較慢,壓力大,因此氣流往凸面方向推擠,這種動能稱作「浮力」,這也就是讓飛機與飛盤起飛的原理。如何讓迴旋鏢旋飛不掉落?主要跟你快速選轉的腰部動作有關係,你可能會知道類似的旋轉原理如陀螺或保齡球,角動量(Angularmomentum)使得旋轉的物體保持一定的恆動速率,所以你的迴旋鏢會持續旋轉。同時浮力會牽引迴旋鏢往曲面方向前進。這兩種作用力,讓你的迴旋鏢看起來像是遵循著固定的路徑,但是微風也可以使迴旋鏢改變方向,這也使得每次丟擲預測路徑顯得相當刺激。 商品規格 品牌:德國MOSES適用年齡:3歲以上材質成分:塑膠(聚丙烯)包裝尺寸:約27x31cm包裝重量:約87g產地:MOSES授權中國廠製造注意:本產品不適合三歲以下幼兒使用請勿將飛鏢朝人體(頭部)投擲或攻擊請在戶外空曠場地使用.detal{color:#4D4D4D;font-size:5.5em;text-align:center;padding:50px400px20px400px;}.desc1{color:#FF9933;font-size:2.5em;padding:20px;padding-top:50px;text-align:center;line-height:1.8em;}.desc2{font-size:2em;color:#FFFFFF;background-color:#00B5CA;padding:20px80px50px80px;line-height:1.5em;max-width:900px;margin:0auto;}.desc3{font-size:2em;color:#FFFFFF;background-color:#94C131;padding:20px80px50px80px;line-height:1.5em;max-width:900px;margin:0auto;}.Janod{text-align:left;font-size:2em;width:100%;max-width:900px;padding:10px;color:#61A60E}.Janod2{text-align:left;font-size:2.7em;width:100%;max-width:900px;padding:10px;font-weight:bold;}.Janod2span{font-weight:lighter;font-size:0.8em;}.Janod3{background:#EBA900;text-align:left;font-size:2em;width:100%;max-width:840px;padding:30px;margin:10px30px;color:#FFFFFF;}.Janod11{position:relative;max-width:900px;width:100%;}.Janod12p{text-align:right;position:absolute;top:151px;right:68px;font-size:4.5em;font-weight:bold;line-height:0.8em;color:#ffffff}.Janod12span{font-weight:lighter;font-size:0.5em;line-height:0.8em;color:#ffffff;}.Janod21{position:relative;max-width:900px;width:100%;}.Janod22p{text-align:left;position:absolute;top:228px;left:115px;font-size:4.5em;font-weight:bold;line-height:0.8em;color:#666666;}.Janod22span{font-weight:lighter;font-size:0.5em;color:#666666;}.Janod22.J22{font-weight:lighter;font-size:1em;color:#0C6BB0;}.Janod31{position:relative;max-width:900px;width:100%;}.Janod32p{text-align:left;position:absolute;bottom:92px;right:85px;font-size:4.5em;font-weight:bold;line-height:0.8em;color:#00539A;}.Janod32span{font-weight:lighter;font-size:0.5em;line-height:0.8em;color:#00539A;}.Janod31{position:relative;max-width:900px;width:100%;}.Janod32-1p{text-align:left;position:absolute;top:144px;right:54px;font-size:3em;font-weight:bold;color:#008A54;}.Janod32-1span{font-weight:lighter;font-size:0.7em;color:#666767;}.Janod41{position:relative;max-width:900px;width:100%;}.Janod42p{text-align:left;position:absolute;top:225px;left:96px;font-size:4.5em;font-weight:bold;line-height:0.8em;color:#666666;}.Janod42span{font-weight:lighter;font-size:0.5em;line-height:0.8em;color:#666666;}.Janod51{position:relative;max-width:900px;width:100%;}.Janod52p{text-align:left;position:absolute;top:95px;right:58px;font-size:4.5em;font-weight:bold;line-height:0.8em;color:#666666;}.Janod52span{font-weight:lighter;font-size:0.5em;line-height:0.8em;color:#666666;}.Janod61{position:relative;max-width:900px;width:100%;}.Janod62p{text-align:left;position:absolute;top:128px;left:83px;font-size:3em;font-weight:bold;color:#008A54;}.Janod62span{font-weight:lighter;font-size:0.7em;color:#666767;}.Janod71{position:relative;max-width:900px;width:100%;}.Janod72p{text-align:left;position:absolute;top:73px;right:154px;font-size:3em;font-weight:bold;color:#008A54;}.Janod72span{font-weight:lighter;font-size:0.7em;color:#666767;}.Janod81{position:relative;max-width:900px;width:100%;}.Janod82p{text-align:left;position:absolute;top:288px;left:118px;font-size:3em;font-weight:bold;color:#D35C44;}.Janod82span{font-weight:lighter;font-size:0.7em;color:#666767;}.Janod91{position:relative;max-width:900px;width:100%;}.Janod92p{text-align:left;position:absolute;top:158px;right:78px;font-size:3em;font-weight:bold;color:#D35C44;}.Janod92span{font-weight:lighter;font-size:0.7em;color:#595757;}.Janod101{position:relative;max-width:900px;width:100%;}.Janod102p{text-align:left;position:absolute;top:44px;right:460px;font-size:3em;font-weight:bold;color:#D35C44;}.Janod102span{font-weight:lighter;font-size:0.7em;color:#595757;}.All_Specification{width:100%;max-width:900px;}.All_Specification.title-cp{line-height:2em;font-size:4em;color:#545454;position:relative;font-weight:bold;}.hori-line{width:70%;border-top:solidthin#545454;position:absolute;top:50%;right:0%;}.All_Specificationp{font-size:2em;line-height:1.2em;color:#717071;}.Notice{color:#ff1414;font-weight:bold;}.product_mark{color:#ffffff;background-color:#0098a6;width:100%;max-width:900px;}.product_markp{font-size:2.2em;padding:1.2em;line-height:1.6em;}@mediascreenand(max-width:480px){.desc1{color:#FF9933;font-size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