{"id":9959,"date":"2011-11-08T14:23:00","date_gmt":"2011-11-08T14:23:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=9959"},"modified":"2011-11-08T14:23:00","modified_gmt":"2011-11-08T14:23:00","slug":"%ea%b0%90-%eb%8d%98%ec%a7%80%ea%b8%b0","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=9959","title":{"rendered":"\uac10 \ub358\uc9c0\uae30"},"content":{"rendered":"
\n
\n\"\"\n<\/div>\n

\uc9c0\ub3c4\ub294 \ub2e4\uc74c\ub9f5\uc5d0\uc11c \ud37c\uc654\ub2e4. \ub098\ub984 \uc218\ub2a5\ud2b9\uc9d1.<\/p>\n

1.
\n
\n \uba54\uc2e0\uc800\ub85c \uc544\ub294 \uce5c\uad6c\ud55c\ud14c \uac10 \uba39\ub294\ub2e4\uace0 \uc790\ub791\ud588\ub354\ub2c8 \ub358\uc838\ub2ec\ub77c\uace0 \ud55c\ub2e4. \uadf8 \uce5c\uad6c\ub294 \ub300\uad6c\uc5d0 \uc0b0\ub2e4.<\/p>\n

\uacc4\uc0b0\uc744 \ud3b8\ud558\uac8c \ud558\uae30 \uc704\ud574\uc11c 200km\ub97c \ub358\uc9c4\ub2e4\uace0 \uac00\uc815\ud574\ub3c4 \ubb34\ub9ac\uac00 \uc5c6\uc744 \uac83\uc774\ub2e4. \uc774\ub860\uc801\uc778 \uac01\ub3c4\uc778 45\ub3c4\ub85c \ub358\uc9c4\ub2e4\uace0 \uac00\uc815\ud558\uba74 \uc5bc\ub9c8\ub098 \ube60\ub978 \uc18d\ub825\uc73c\ub85c \ub358\uc838\uc57c \uad11\uc8fc\uc5d0\uc11c \ub358\uc9c4 \uac10\uc774 \ub300\uad6c\uc5d0 \ub5a8\uc5b4\uc9c8\uae4c?<\/p>\n

200km\ub97c \uc218\ud3c9\uc18d\ub825 v(m\/s)\uc758 \uc18d\ub825\uc73c\ub85c \ub2ec\ub824\uac00\uba74 (200000\/v)\ucd08\uac00 \uac78\ub9b0\ub2e4.
\n
\n \uc62c\ub77c\uac14\ub2e4 \ub5a8\uc5b4\uc9c0\ub294\ub370 \uac78\ub9ac\ub294 \uc2dc\uac04\uc740 \uc911\ub825\uac00\uc18d\ub3c4 g\ub97c \uc54c\uace0 \uc788\uc744 \ub54c 2*v\/g\ub85c \ud45c\ud604\ud560 \uc218 \uc788\ub294\ub370, \uc62c\ub77c\uac14\ub2e4 \ub5a8\uc5b4\uc9c0\ub294 \uc0ac\uc774\uc5d0 \uac10\uc740 \uad11\uc8fc\uc5d0\uc11c \ub300\uad6c\uae4c\uc9c0 \ub2ec\ub824\uac00\uc57c \ud558\ubbc0\ub85c \uadf8 \uc2dc\uac04\uc740 \uac19\ub2e4. \ub530\ub77c\uc11c 2*v\/g = 200000\/v<\/p>\n

\uac04\ub2e8\ud788 \uc57d\ubd84\ud558\uace0 g=10\uc73c\ub85c \uac00\uc815\ud558\uba74
\n
\n v*v = 1000000
\n
\n v = 1000m\/s
\n
\n 45\ub3c4\uc600\uc73c\ub2c8\uae4c, \uc2e4\uc81c\ub85c\ub294 \uc774\ubcf4\ub2e4 1.4\ubc30 \ub354 \ube60\ub974\uac8c \ub358\uc838\uc57c \ud55c\ub2e4. \ucd5c\uc885\uc801\uc73c\ub85c 1400m\/s\uc758 \uc18d\ub825\uc73c\ub85c \ub358\uc838\uc57c \ud55c\ub2e4.<\/p>\n

\ucc38\uace0\ub85c, \uc18c\ub9ac\uc758 \uc18d\ub825\uc740 340m\/s\uc774\ub2e4.
\n
\n
\n http:\/\/ko.wikipedia.org\/wiki\/%EC%9D%8C%EC%86%8D
\n <\/a><\/p>\n

\uc74c\uc18d\uc758 4\ubc30 \uc815\ub3c4\ub85c \ub358\uc9c0\uba74 \uad11\uc8fc\uc5d0\uc11c \ub300\uad6c\uae4c\uc9c0 \ubb3c\uac74\uc744 \ub358\uc838\uc904 \uc218 \uc788\ub2e4.
\n
\n
\n http:\/\/blog.naver.com\/PostView.nhn?blogId=dapapr&logNo=110098535061
\n <\/a>
\n
\n \uc704\uc5d0 \uc6f9 \ud398\uc774\uc9c0\ub97c \uac00 \ubcf4\uba74 \uc74c\uc18d \ub3cc\ud30c\uc2dc \uc5b4\ub5a4 \uc77c\uc774 \uc77c\uc5b4\ub098\ub294\uc9c0 \ubcfc \uc218 \uc788\ub2e4.<\/p>\n

\ucc38\uace0\ub85c, \uc800\uac83\ubcf4\ub2e4 5\ubc30\ub9cc \ub354 \ube60\ub974\uac8c \ub358\uc9c8 \uc218 \uc788\uc73c\uba74 \ub2e8\uac10\uc740 \ubbf8\uad6d \ud56d\uacf5\uc6b0\uc8fc\uad6d(NASA)\uc758 \ucd94\uc801\uc744 \ubc1b\ub294 \uc778\uacf5\uc704\uc131\uc774 \ub41c\ub2e4.
\n
\n
\n http:\/\/ko.wikipedia.org\/wiki\/%ED%83%88%EC%B6%9C_%EC%86%8D%EB%8F%84
\n <\/a><\/p>\n

2.
\n
\n \uc2e4\uc81c\ub85c \ub358\uc9c8 \uc218 \uc788\ub2e4\uace0 \uac00\uc815\ud558\uba74, \ud314\uc774 \ub9cc\ub4e4\uc5b4 \ub0b4\uc57c \ud558\ub294 \uac00\uc18d\ub3c4\ub294 \uc5bc\ub9c8\ub098 \ucee4\uc57c \ud560\uae4c?<\/p>\n

\ub0b4 \ud314\uc758 \uae38\uc774\ub294 \uc57d 50cm\uc774\uace0, \uac00\uc7a5 \ub4a4\ub85c \uc81c\uaf08\ub2e4\uac00 \uac00\uc7a5 \uc55e\uc73c\ub85c \ub358\uc9c4\ub2e4\uace0 \uac00\uc815\ud558\uba74 \uc57d 1m\ub97c \uc6c0\uc9c1\uc77c \uc218 \uc788\ub2e4.<\/p>\n

\ub530\ub77c\uc11c, 1m\ub97c \uc6c0\uc9c1\uc774\ub294 \uc0ac\uc774\uc5d0 1400m\/s\uae4c\uc9c0 \uac00\uc18d\ud574\uc57c \ud55c\ub2e4.<\/p>\n

\uadf8\ub7fc 2*a*1 = 1400*1400\uc758 \uacf5\uc2dd\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4. a = 980000m\/s^2
\n
\n \ucc38\uace0\ub85c, \uc911\ub825 \uac00\uc18d\ub3c4 g\ub294 g=9.8m\/s^2\uc774\ubbc0\ub85c, \uc911\ub825\uac00\uc18d\ub3c4\uc758 100000\ubc30 \uc815\ub3c4\ub85c \ud070 \uac00\uc18d\ub3c4\ub97c \ub0b4\uc57c \ud55c\ub2e4.<\/p>\n

3.
\n
\n \uc774 \uac00\uc18d\ub3c4\ub85c \ub358\uc9c0\uba74, \uacfc\uc5f0 \uba87\ucd08 \uc548\uc5d0 \ub05d\uc5d0\uc11c \ub05d\uc73c\ub85c \ub358\uc838\uc57c \ud560\uae4c? \uc18d\ub825\uc774 1400m\/s\uc774\uace0 \uac00\uc18d\ub3c4\uac00 1400*700m\/s^2\uc774\ubbc0\ub85c, \uc18d\ub825\uc744 \uac00\uc18d\ub3c4\ub85c \ub098\ub204\uba74 1\/700\ucd08\uc774\ub2e4. 1.5\ubc00\ub9ac\ucd08 \uc815\ub3c4 \ub41c\ub2e4.<\/p>\n


\n http:\/\/ask.nate.com\/qna\/view.html?n=6338510
\n <\/a>
\n
\n \ub208 \uae5c\ube61\ud560 \uc0ac\uc774\uac00 \uc57d 1\ubc00\ub9ac\ucd08 \uc815\ub3c4 \ub418\ubbc0\ub85c, \ub208 \uac10\ube61\ud558\ub294 \uc0ac\uc774\uc5d0 \uc190\ub05d\uc774 \ub4a4\uc5d0\uc11c \uc55e\uc73c\ub85c \uc6c0\uc9c1\uc77c \uc218 \uc788\ub2e4\uba74 \uac00\ub2a5\uc131\uc774 \uc788\ub2e4. \ubb3c\ub860 \ub208\uc744 \uc624\ub7ab\ub3d9\uc548 \uac10\uace0 \uc788\ub294 \uac83\uc740 \ubc18\uce59.<\/p>\n

4.
\n
\n \uadf8\ub7fc, \uadf8 \uac00\uc18d\ub3c4\ub97c \ub9cc\ub4e4\uc5b4 \ub0b4\uae30 \uc704\ud574 \ud314 \ud798\uc740 \uc5bc\ub9c8\ub098 \uac15\ud574\uc57c \ud560\uae4c?<\/p>\n


\n http:\/\/ssfarm.kr\/goods\/view.php?seq=6
\n <\/a><\/p>\n

\ub2e8\uac10 15kg \ud55c\uc0c1\uc790\uc5d0 70~79\uac1c\uc815\ub3c4 \ub4e4\uc5b4\uac00 \uc788\ub2e4\uace0 \ud55c\ub2e4. \uadf8\ub7fc 1\uac1c\ub294 \uc57d 0.2kg\uc815\ub3c4\ub85c \ubcfc \uc218 \uc788\uaca0\ub2e4.<\/p>\n

F=ma\uc774\ubbc0\ub85c \ud798\uc740 F=0.2*980000 = 196000N\uc774 \ub41c\ub2e4. \uc2e4\uc81c\ub85c \uccb4\uac10 \uac00\ub2a5\ud55c \uc218\ub85c \ubc14\uafb8\ub824\uba74 \uc911\ub825\uac00\uc18d\ub3c4\ub85c \ub098\ub220\ubcf4\uba74 \ub418\ub294\ub370, 196000N\uc758 \ud798\uc744 \uc911\ub825\uc73c\ub85c \uac00\uc815\ud55c\ub2e4\uba74 20000kg\uc758 \ubb34\uac8c\uc640 \uac19\ub2e4. \uc989, 20\ud1a4\uc744 \ub358\uc9c0\ub294 \ud798\uc774 \ud544\uc694\ud558\ub2e4.<\/p>\n

\uc548\ub418\uaca0\ub2e4. \uc0ac\ub78c \ubd88\ub7ec\uc57c\uaca0\ub2e4.<\/p>\n

5.
\n
\n \uc5b4\uca0c\uac70\ub098 \ub358\uc84c\ub2e4 \uce58\uc790. \uc0b4\uc774 \ube60\uc9c8\uae4c?
\n
\n F=ma\uc774\uace0 W=Fs\uc778\ub370, 196000N\uc758 \ud798\uc73c\ub85c 1m\ub97c \uc6c0\uc9c1\uc600\uc73c\ubbc0\ub85c 196000J\uc758 \uc77c\uc744 \ud55c \uac83\uacfc \uac19\ub2e4.<\/p>\n

1cal = 4.184J\ub77c\uace0 \ud55c\ub2e4.
\n
\n \uadf8\ub7fc 46845cal\uc758 \uc77c\uc744 \ud55c \uac83\uacfc \uac19\ub2e4. \ub300\ub7b5 47kcal\ub85c \uadfc\uc0ac\ud558\uc790. \ub2e8\uae30\uac04\uc758 \uc6b4\ub3d9\uc744 \ud558\ub294 \uacbd\uc6b0, \ud0c4\uc218\ud654\ubb3c\uc774 \uba3c\uc800 \uc18c\ube44\ub418\ubbc0\ub85c 1g\ub2f9 4kcal\uc758 \uc5f4\ub7c9\uc73c\ub85c \uacc4\uc0b0\ud560 \uc218 \uc788\ub2e4. \ub530\ub77c\uc11c \uc57d 12g\uc758 \ud0c4\uc218\ud654\ubb3c\uc774 \uc5d0\ub108\uc9c0\ub85c \ubcc0\ud658\ub41c\ub2e4. (\uc778\uccb4 \ud6a8\uc728\uc774 100%\ub77c\uace0 \uac00\uc815\ud55c\ub2e4\uba74 \ub9d0\uc774\uc9c0\ub9cc.)<\/p>\n

6.
\n
\n \uac10\uc774 \uc9c0\ub9ac\uc0b0\uc5d0 \ubd80\ub52a\ud790\uae4c?<\/p>\n

\uc9c0\ub3c4\uc5d0 \ubcf4\uba74 \uc9c0\ub9ac\uc0b0\uc740 \ub300\ub7b5 \uad11\uc8fc\uc640 \ub300\uad6c\uc758 \uc911\uac04\ucbe4, 100km\uc9c0\uc810\uc5d0 \uc788\ub2e4. \ucd5c\uace0\ubd09\uc774 \uc9c1\uc120\uac70\ub9ac\uc5d0 \uc788\uc9c0\ub294 \uc54a\uc9c0\ub9cc, \ub300\ucda9 \uadf8\ucbe4\uc5d0 \uc788\ub2e4 \uce58\uc790. \uc9c0\ub9ac\uc0b0 \ucd5c\uace0\ubd09\uc758 \ub192\uc774\ub294 2km\uac00 \uc870\uae08 \uc548\ub41c\ub2e4. 2km\ub77c\uace0 \uac00\uc815\ud558\uc790.
\n
\n
\n http:\/\/www.koreasanha.net\/san\/jiri.htm
\n <\/a><\/p>\n

\uc815\ud655\ud788 \uc911\uac04\uc9c0\uc810\uc5d0 \uc654\uc744 \ub54c, \uac10\uc758 \ub192\uc774\ub294 \uc5bc\ub9c8\uc77c\uae4c? \uc704\ub85c\ub294 1000m\/s\uc758 \uc18d\ub825\uc73c\ub85c, 10m\/s^2\uc758 \uac00\uc18d\ub3c4\ub85c \uc6c0\uc9c1\uc774\ubbc0\ub85c \ucd5c\ub300\uc9c0\uc810\uc5d0 \ub3c4\ub2ec\ud558\ub294\ub370 100\ucd08 \uac78\ub9b0\ub2e4. \uadf8\ub7fc \ucd5c\ub300 \ub3c4\ub2ec \ub192\uc774\ub294 0.5*10*100*100 =50000m = 50km\uc774\ub2e4. \uc989, \uac10\uc740 \uadf9\ub300\uc810\uc5d0\uc11c 50km\ub192\uc774 \uadfc\ubc29\uc5d0 \uc788\uc73c\ubbc0\ub85c \uc9c0\ub9ac\uc0b0\uc5d0 \uac78\ub9b4 \uc77c\uc740 \uc5c6\ub2e4.<\/p>\n

\uace0\uada4\ub3c4 \ube44\ud589\uae30\ub098 \uc778\uacf5\uc704\uc131\uc5d0 \uac78\ub9b4 \uc218\ub294 \uc788\uaca0\ub2e4. \uc544\ub2c8\uba74 U2\uac19\uc740\uac70\ub77c\ub3c4.
\n <\/p>\n

\n
\n
\n\"\uc2e0\uace0\"
\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\uc9c0\ub3c4\ub294 \ub2e4\uc74c\ub9f5\uc5d0\uc11c \ud37c\uc654\ub2e4. \ub098\ub984 \uc218\ub2a5\ud2b9\uc9d1. 1. \uba54\uc2e0\uc800\ub85c \uc544\ub294 \uce5c\uad6c\ud55c\ud14c \uac10 \uba39\ub294\ub2e4\uace0 \uc790\ub791\ud588\ub354\ub2c8 \ub358\uc838\ub2ec\ub77c\uace0 \ud55c\ub2e4. \uadf8 \uce5c\uad6c\ub294 \ub300\uad6c\uc5d0 \uc0b0\ub2e4. \uacc4\uc0b0\uc744 \ud3b8\ud558\uac8c \ud558\uae30 \uc704\ud574\uc11c 200km\ub97c \ub358\uc9c4\ub2e4\uace0 \uac00\uc815\ud574\ub3c4 \ubb34\ub9ac\uac00 \uc5c6\uc744 \uac83\uc774\ub2e4. \uc774\ub860\uc801\uc778 \uac01\ub3c4\uc778 45\ub3c4\ub85c \ub358\uc9c4\ub2e4\uace0 \uac00\uc815\ud558\uba74 \uc5bc\ub9c8\ub098 \ube60\ub978 \uc18d\ub825\uc73c\ub85c \ub358\uc838\uc57c \uad11\uc8fc\uc5d0\uc11c \ub358\uc9c4 \uac10\uc774 \ub300\uad6c\uc5d0 \ub5a8\uc5b4\uc9c8\uae4c? 200km\ub97c \uc218\ud3c9\uc18d\ub825 v(m\/s)\uc758 \uc18d\ub825\uc73c\ub85c \ub2ec\ub824\uac00\uba74 (200000\/v)\ucd08\uac00 \uac78\ub9b0\ub2e4. \uc62c\ub77c\uac14\ub2e4 \ub5a8\uc5b4\uc9c0\ub294\ub370 \uac78\ub9ac\ub294 \uc2dc\uac04\uc740 \uc911\ub825\uac00\uc18d\ub3c4 g\ub97c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-9959","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-2AD","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/9959","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9959"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/9959\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9959"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}