{"id":77414,"date":"2022-10-21T14:00:47","date_gmt":"2022-10-21T07:00:47","guid":{"rendered":"https:\/\/superapp.id\/blog\/?p=77414"},"modified":"2022-10-21T09:49:44","modified_gmt":"2022-10-21T02:49:44","slug":"hukum-kekekalan-energi","status":"publish","type":"post","link":"https:\/\/superapp.id\/blog\/uncategorized\/hukum-kekekalan-energi\/","title":{"rendered":"Hukum Kekekalan Energi: Definisi, Jenis, Rumus &#038; Contohnya"},"content":{"rendered":"<p><span style=\"font-weight: 400; color: #000000;\">Seperti yang kita ketahui bersama, energi tidak bisa diciptakan ataupun dimusnahkan. Hal inilah yang dikenal sebagai Hukum Kekekalan Energi. Hukum yang ditemukan oleh seorang fisikawan bernama James Prescott Joule ini memiliki manfaat bagi kemajuan ilmu pengetahuan hingga saat ini.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Dalam kehidupan sehari-hari, penerapan Hukum Kekekalan Energi sangatlah luas. Tak hanya itu, hukum ini juga sangat berpengaruh terhadap aktivitas yang dilakukan manusia. Sedulur bisa menemukannya pada alat musik, kendaraan bermotor, dan pembangkit listrik. <\/span><span style=\"font-weight: 400;\">Bagaimana informasi selengkapnya mengenai Hukum Kekekalan Energi tersebut? Simak informasi berikut ini, yuk!<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\"><b>BACA JUGA: <\/b><a style=\"color: #000000;\" href=\"https:\/\/superapp.id\/blog\/lifestyle\/hukum-pascal\/\"><b>Hukum Pascal: Pengertian, Bunyi, Rumus, dan Penerapannya<\/b><\/a><\/span><\/p>\n<h2><span style=\"color: #000000;\"><b>Definisi Hukum Kekekalan Energi<\/b><\/span><\/h2>\n<figure id=\"attachment_77416\" aria-describedby=\"caption-attachment-77416\" style=\"width: 602px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-77416\" src=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/hukk.jpg\" alt=\"hukum kekekalan energi\" width=\"612\" height=\"408\" srcset=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/hukk.jpg 612w, https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/hukk-390x260.jpg 390w\" sizes=\"(max-width: 612px) 100vw, 612px\" \/><figcaption id=\"caption-attachment-77416\" class=\"wp-caption-text\"><\/span> <span style=\"color: #000000;\">iStock<\/span><\/figcaption><\/figure>\n<p><span style=\"font-weight: 400; color: #000000;\">Hukum kekekalan energi adalah salah satu hukum yang dirumuskan oleh fisikawan asal Inggris yaitu James Prescott Joule. Hukum kekekalan energi berbunyi &#8220;energi tidak dapat diciptakan ataupun dimusnahkan&#8221;.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Meskipun begitu, energi dapat diubah menjadi bentuk yang lain. Perubahan tersebut dapat dimanfaatkan untuk kepentingan energi. Dalam mempelajari perubahan energi, cabang ilmu yang menaunginya adalah ilmu konversi energi.<\/span><\/p>\n<h2><span style=\"color: #000000;\"><b>Sifat energi<\/b><\/span><\/h2>\n<p><span style=\"font-weight: 400; color: #000000;\">Energi memiliki beberapa sifat, yaitu:\u00a0<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi dapat berpindah ke benda lain melalui suatu gaya yang menyebabkan adanya pergeseran. Gaya tersebut dikenal sebagai energi mekanik.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi bersifat kekal, artinya tidak dapat diciptakan dan dimusnahkan.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi dapat diubah menjadi bentuk lain atau mengalami transformasi energi.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi panas dapat dipindah dari material satu ke material lainnya melalui transfer energi.<\/span><\/li>\n<\/ol>\n<p><span style=\"color: #000000;\"><b>BACA JUGA: <\/b><a style=\"color: #000000;\" href=\"https:\/\/superapp.id\/blog\/lifestyle\/fisika-kuantum\/\"><b>Pengertian Fisika Kuantum Beserta Fakta-Fakta Menariknya<\/b><\/a><\/span><\/p>\n<h2><span style=\"color: #000000;\"><b>Jenis-jenis energi<\/b><\/span><\/h2>\n<figure id=\"attachment_77417\" aria-describedby=\"caption-attachment-77417\" style=\"width: 602px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-77417\" src=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/hukw.jpg\" alt=\"mendoong mobil\" width=\"612\" height=\"408\" srcset=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/hukw.jpg 612w, https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/hukw-390x260.jpg 390w\" sizes=\"(max-width: 612px) 100vw, 612px\" \/><figcaption id=\"caption-attachment-77417\" class=\"wp-caption-text\"><\/span> <span style=\"color: #000000;\">iStock<\/span><\/figcaption><\/figure>\n<p><span style=\"font-weight: 400; color: #000000;\">Sang penemu, James Prescott Joule, membedakan energi menjadi 3 jenis, yaitu:\u00a0<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi mekanik, yakni energi yang berkaitan dengan posisi dan gerak dari sebuah benda.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi potensial, yakni energi pada benda yang disebabkan oleh posisi dari ketinggian benda tersebut.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Energi kinetik, yakni energi yang dibutuhkan untuk menggerakkan benda oleh massa tertentu dari kondisi diam menjadi kecepatan tertentu.\u00a0<\/span><\/li>\n<\/ol>\n<h2><span style=\"color: #000000;\"><b>Rumus energi<\/b><\/span><\/h2>\n<p><span style=\"color: #000000;\"><b>Em1 = Em2 <\/b><span style=\"font-weight: 400;\">atau <\/span><b>Ek1 + Ep1 = Ek2 + Ep2<\/b><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Keterangan:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Em1: energi mekanik awal<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Em2: energi mekanik akhir (Joule)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Ek1: energi kinetik awal<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Ek2: energi kinetik akhir (Joule)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Ep1: energi potensial awal<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Ep2: energi potensial akhir (Joule)<\/span><\/li>\n<\/ul>\n<h2><span style=\"color: #000000;\"><b>Contoh dalam kehidupan sehari-hari<\/b><\/span><\/h2>\n<figure id=\"attachment_77418\" aria-describedby=\"caption-attachment-77418\" style=\"width: 602px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-77418\" src=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/humew.jpg\" alt=\"hukum kekekalan energi\" width=\"612\" height=\"410\" srcset=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/humew.jpg 612w, https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/humew-390x260.jpg 390w\" sizes=\"(max-width: 612px) 100vw, 612px\" \/><figcaption id=\"caption-attachment-77418\" class=\"wp-caption-text\"><\/span> <span style=\"color: #000000;\">iStock<\/span><\/figcaption><\/figure>\n<p><span style=\"font-weight: 400; color: #000000;\">Ada beberapa contoh yang bisa menunjukkan Hukum Kekekalan Energi dalam kehidupan sehari-hari.<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Adanya perubahan energi potensial listrik oleh elemen pemanas dari benda menjadi energi panas. Benda tersebut antara lain, teko pemanas air, solder, setrika, penghangat ruangan, dan pemanggang roti.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Adanya perubahan energi potensial air menjadi energi kinetik lalu menjadi energi listrik pada pembangkit listrik tenaga air.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Adanya perubahan energi potensial kimia dari bahan bakar menjadi energi kinetik pada kendaran bermotor.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Adanya perubahan energi kinetik dari otot tangan menjadi energi bunyi pada alat musik, seperti gitar, piano, drum, dan biola.\u00a0<\/span><\/li>\n<\/ol>\n<p><span style=\"color: #000000;\"><b>BACA JUGA: <\/b><a style=\"color: #000000;\" href=\"https:\/\/superapp.id\/blog\/uncategorized\/gaya-coulomb\/\"><b>Hukum Coulomb adalah: Pengertian, Rumus &amp; Contoh Soalnya<\/b><\/a><\/span><\/p>\n<h2><span style=\"color: #000000;\"><b>Contoh soal<\/b><\/span><\/h2>\n<figure id=\"attachment_77419\" aria-describedby=\"caption-attachment-77419\" style=\"width: 602px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-77419\" src=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/humw.jpg\" alt=\"hukum kekekalan energi\" width=\"612\" height=\"408\" srcset=\"https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/humw.jpg 612w, https:\/\/superapp.id\/blog\/wp-content\/uploads\/2022\/10\/humw-390x260.jpg 390w\" sizes=\"(max-width: 612px) 100vw, 612px\" \/><figcaption id=\"caption-attachment-77419\" class=\"wp-caption-text\"><\/span> <span style=\"color: #000000;\">iStock<\/span><\/figcaption><\/figure>\n<ol>\n<li><span style=\"font-weight: 400; color: #000000;\"> Jika sebuah benda bermassa 1 kg dilempar secara vertikal ke atas dengan kecepatan awal adalah 20 m\/s dan percepatan gravitasi g = 10 m\/s\u00b2, maka ketinggian benda saat energi potensialnya sama dengan tiga perempat energi kinetik maksimumnya adalah?<\/span><\/li>\n<\/ol>\n<p><span style=\"color: #000000;\"><b>Jawab:<\/b><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Diketahui:<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Massa (m) = 1 kg\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Kecepatan awal (V1) = 20 m\/s percepatan gravitasi g = 10 m\/s\u00b2<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ep = \u00be Ek maksimum<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ditanyakan:\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ketinggian benda saat Ep = \u00be Ek maksimum ?<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Dijawab:<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Benda bergerak ke atas atau secara vertikal, maka energi kinetik maksimum benda tersebut adalah saat awal gerak kecepatan benda dilemparkan. Dengan begitu,\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ek maks = Ek awal\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ek maks = 1\/2.m.v12<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ek maks = 1\/2.1.(20)2<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ek mask = 200 joule<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Sementara itu, ketinggian benda dapat dihitung dengan cara:<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ep = \u00be x Ek maks\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">m.g.h = \u00be (200)\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">1.10.h = 150\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">10h = 150<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">\u00a0h = 15 meter.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Jadi, ketinggian benda saat energi potensial benda sama dengan tiga perempat energi kinetik maksimum adalah 15 meter.<\/span><\/p>\n<ol start=\"2\">\n<li><span style=\"font-weight: 400; color: #000000;\"> Durian kecil dengan massa 300 gram jatuh dari pohon pada ketinggian 10 meter. Jika percepatan gravitasi (g) = 10 m\/s\u00b2, berapakah energi mekanik pada durian kecil tersebut!<\/span><\/li>\n<\/ol>\n<p><span style=\"color: #000000;\"><b>Jawab:<\/b><\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Diketahui:<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Massa benda = 300 gram (0,3 kg)\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Gravitasi g = 10 m\/s\u00b2\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ketinggian h = 10 m\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Ditanyakan:\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Energi mekanik (Em) durian kecil?<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Diawab:<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Jika ada benda jatuh dan tidak diketahui kecepatannya, maka energi kinetik (Ek) akan diasumsikan memiliki nilai nol (Ek = 0). Maka,\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Em = Ep + Ek<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Em = Ep + 0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Em = Ep\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Em = m.g.h\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Em = 0,3 kg . 10 .10\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Em = 30 joule<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000;\">Jadi, energi mekanik yang dimiliki oleh durian kecil yang jatuh tersebut adalah 30 joule.<\/span><\/p>\n<div class=\"rltdpstsplgn-related-post-block\"><h4 class=\"rltdpstsplgn-related-title\"><\/h4><p>No related posts found...<\/p><\/div>\n<p><span style=\"font-weight: 400; color: #000000;\">Nah, itulah informasi mengenai Hukum Kekekalan Energi beserta jenis, rumus, dan contohnya. Semoga informasi ini dapat bermanfaat bagi Sedulur semua, ya. Selamat belajar!<\/span><\/p>\n<p><span style=\"color: #000000;\"><i><span style=\"font-weight: 400;\">Mau belanja bulanan nggak pakai ribet? <\/span><\/i><b><i>Aplikasi Super<\/i><\/b><i><span style=\"font-weight: 400;\"> solusinya! Mulai dari sembako hingga kebutuhan rumah tangga tersedia lengkap. Selain harganya murah, Sedulur juga bisa merasakan kemudahan belanja lewat handphone. Nggak perlu keluar rumah, belanjaan pun langsung diantar.<\/span><\/i><\/span><\/p>\n<p><span style=\"color: #000000;\"><i><span style=\"font-weight: 400;\">Bagi Sedulur yang punya toko kelontong atau warung, bisa juga lho belanja grosir atau kulakan lewat <\/span><\/i><b><i>Aplikasi Super<\/i><\/b><i><span style=\"font-weight: 400;\">. Harga dijamin lebih murah dan bikin untung makin melimpah.<\/span><\/i><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":24,"featured_media":77570,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11109,11110],"class_list":["post-77414","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-hukum-kekekalan-energi","tag-kekekalan-energi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hukum Kekekalan Energi: Definisi, Jenis, Rumus &amp; Contohnya<\/title>\n<meta name=\"description\" content=\"Sudah tahu hukum kekekalan energi? Yuk simak di sini! 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