{"id":1488,"date":"2018-10-30T00:00:00","date_gmt":"2018-10-29T16:00:00","guid":{"rendered":"http:\/\/www.osaces.com\/?p=1488"},"modified":"2018-10-30T00:00:00","modified_gmt":"2018-10-29T16:00:00","slug":"youyongchiweishenmeyidingyaoyoushenshuiqu","status":"publish","type":"post","link":"http:\/\/www.osaces.com\/pt\/youyongchiweishenmeyidingyaoyoushenshuiqu\/","title":{"rendered":"Porque \u00e9 que uma piscina tem de ter \u00e1gua profunda?"},"content":{"rendered":"

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<\/div>\n

P: Porque \u00e9 que uma piscina tem de ter \u00e1gua profunda?<\/span><\/strong><\/span><\/p>\n

Antes da constru\u00e7\u00e3o da piscina, o pessoal da empresa de piscinas planeia a localiza\u00e7\u00e3o da zona de \u00e1guas profundas antes do projeto, por isso, porque \u00e9 necess\u00e1rio criar uma zona de \u00e1guas profundas para a piscina?<\/span><\/p>\n

resposta<\/span><\/strong>: De facto, quer se trate de \u00e1guas profundas ou de \u00e1guas pouco profundas, a flutuabilidade \u00e9 a mesma quando uma pessoa est\u00e1 a nadar, a flutuabilidade n\u00e3o muda mas a resist\u00eancia diminui.
Embora seja verdade que a flutuabilidade permanece inalterada, o arrastamento \u00e9 reduzido, especificamente as ondas de \u00e1gua criadas pela \u00e1gua viajam at\u00e9 ao fundo da piscina e reflectem-se de volta, criando arrastamento na pessoa; quanto mais profunda a \u00e1gua, menos arrastamento \u00e9 refletido e mais tempo demora.
Em geral, a resist\u00eancia durante a nata\u00e7\u00e3o prov\u00e9m de tr\u00eas fontes principais:<\/span><\/p>\n

<\/span>1\u3001Resist\u00eancia \u00e0 forma<\/span>
<\/span>\u00c9 tamb\u00e9m a resist\u00eancia causada pela forma da pessoa, pelo que a postura corporal \u00e9 enfatizada no ensino da nata\u00e7\u00e3o e os instrutores pedem aos alunos que mantenham o corpo t\u00e3o plano quanto poss\u00edvel para reduzir a \u00e1rea da sec\u00e7\u00e3o transversal, reduzindo assim a resist\u00eancia da forma.<\/span>
<\/span>Pode simplesmente fazer uma pequena experi\u00eancia: palma da m\u00e3o perpendicular \u00e0 superf\u00edcie da \u00e1gua, empurrar a \u00e1gua para a frente; bem como palma da m\u00e3o plana, paralela \u00e0 superf\u00edcie da \u00e1gua, empurrar a \u00e1gua para a frente. Definitivamente, o primeiro esfor\u00e7o deve-se ao facto de a \u00e1rea da sec\u00e7\u00e3o transversal ser grande, a forma da resist\u00eancia ser grande, pelo que se sentir\u00e1 mais esfor\u00e7o.<\/span><\/span><\/p>\n

2,<\/span><\/span>resist\u00eancia da superf\u00edcie<\/span>
<\/span><\/p>\n

Trata-se de algo que a pessoa m\u00e9dia pode sentir menos por ser t\u00e3o comum, principalmente sob a forma de resist\u00eancia criada pela fric\u00e7\u00e3o entre a superf\u00edcie do objeto (o nadador) e a \u00e1gua; geralmente, quanto mais suave for a \u00e1gua, menor \u00e9 a resist\u00eancia; a pessoa m\u00e9dia deve sentir praticamente o mesmo.<\/span><\/span><\/p>\n

3\u3001Resist\u00eancia \u00e0s ondas de \u00e1gua<\/span>
<\/span><\/p>\n

Como o nome sugere, \u00e9 a resist\u00eancia causada pelas ondas de \u00e1gua \u00e0s pessoas, em suma, normalmente vemos a nata\u00e7\u00e3o para ver o salpico, o salpico \u00e9 grande, a resist\u00eancia tamb\u00e9m \u00e9 grande, quanto maior for a velocidade, as ondas de \u00e1gua tamb\u00e9m ser\u00e3o maiores, a resist\u00eancia tamb\u00e9m se tornar\u00e1 maior. Esta \u00e9 tamb\u00e9m a raz\u00e3o para criar uma piscina funda.<\/span>
<\/span>Quanto mais profunda for a \u00e1gua, menor ser\u00e1 a perturba\u00e7\u00e3o reflectida e menor ser\u00e1 a resist\u00eancia das ondas de \u00e1gua. Al\u00e9m disso, a profundidade da \u00e1gua torna mais f\u00e1cil para o atleta contornar a resist\u00eancia das ondas atrav\u00e9s do mergulho (uma vez que a resist\u00eancia das ondas \u00e9 menor debaixo de \u00e1gua do que \u00e0 superf\u00edcie).<\/span><\/span><\/p>\n

\u00c9 por isso que as piscinas padr\u00e3o para competi\u00e7\u00f5es internacionais est\u00e3o agora a atingir os<\/span>3<\/span>A raz\u00e3o para o metro de profundidade da \u00e1gua.<\/span><\/span><\/p>\n


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

<\/p>\n

<\/p>","protected":false},"excerpt":{"rendered":"

P: Porque \u00e9 que uma piscina tem de ter uma zona de \u00e1guas profundas? Antes de uma piscina ser constru\u00edda, o pessoal da empresa de piscinas planeia antecipadamente a \u00e1rea de \u00e1guas profundas durante o projeto, ent\u00e3o porque \u00e9 que [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[125],"tags":[],"yoast_head":"\n\u6e38\u6cf3\u6c60\u4e3a\u4ec0\u4e48\u4e00\u5b9a\u8981\u6709\u6df1\u6c34\u533a\uff1f - \u5965\u5229\u4ed5\uff08\u5e7f\u5dde\uff09\u5eb7\u4f53\u8bbe\u5907\u6709\u9650\u516c\u53f8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.osaces.com\/pt\/youyongchiweishenmeyidingyaoyoushenshuiqu\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6e38\u6cf3\u6c60\u4e3a\u4ec0\u4e48\u4e00\u5b9a\u8981\u6709\u6df1\u6c34\u533a\uff1f - 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