{"common":{"save":0,"post_id":"8477","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7604","mon_id":"1158790","chapter_id":"1158796","post_id":"8477","question":"<p>M\u1ed9t &ocirc; t&ocirc; kh\u1ed1i l\u01b0\u1ee3ng 1 t\u1ea5n \u0111ang chuy\u1ec3n \u0111\u1ed9ng&nbsp;v\u1edbi t\u1ed1c \u0111\u1ed9 72 km\/h th&igrave; h&atilde;m phanh, \u0111i th&ecirc;m&nbsp;\u0111\u01b0\u1ee3c 500 m r\u1ed3i d\u1eebng l\u1ea1i. Ch\u1ecdn&nbsp;chi\u1ec1u d\u01b0\u01a1ng&nbsp;l&agrave; chi\u1ec1u chuy\u1ec3n \u0111\u1ed9ng. L\u1ef1c h&atilde;m t&aacute;c d\u1ee5ng l&ecirc;n&nbsp;xe l&agrave;<\/p>","options":["<strong>A.<\/strong> 800 N","<strong>B.<\/strong> &ndash; 800 N","<strong>C.<\/strong> 400 N","<strong>D.<\/strong> &ndash; 400 N"],"correct":"4","level":"2","hint":"<p>V\u1eadn d\u1ee5ng c&aacute;c c&ocirc;ng th\u1ee9c:&nbsp;<\/p><p><span class=\"math-tex\">$v^2-v_0^2=2as$<\/span><\/p><p><span class=\"math-tex\">$F=m.a$<\/span><\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;&ndash; 400 N.<\/span><\/p><p>\u0110\u1ed5i&nbsp;1 t\u1ea5n = 1000 kg, 72 km\/h = 20 m\/s.<\/p><p>Gia t\u1ed1c c\u1ee7a &ocirc; t&ocirc;:&nbsp;<span class=\"math-tex\">$v^2-v_0^2=2as$<\/span>&nbsp;&rArr;&nbsp;<span class=\"math-tex\">$a=\\dfrac{v^2-v_0^2}{2s}=\\dfrac{0^2-20^2}{2.500}=-0,4\\;(m\/s^2)$<\/span>.<\/p><p>L\u1ef1c h&atilde;m t&aacute;c d\u1ee5ng l&ecirc;n xe:&nbsp;<span class=\"math-tex\">$F=m.a=1000.(-0,4)=-400\\;N$<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-02-21 08:49:48","option_type":"txt","len":2},{"id":"7607","mon_id":"1158790","chapter_id":"1158796","post_id":"8477","question":"<p>M\u1ed9t l\u1ef1c kh&ocirc;ng \u0111\u1ed5i t&aacute;c d\u1ee5ng v&agrave;o m\u1ed9t v\u1eadt c&oacute;&nbsp;kh\u1ed1i l\u01b0\u1ee3ng 6 kg l&agrave;m v\u1eadn t\u1ed1c c\u1ee7a n&oacute; t\u0103ng d\u1ea7n&nbsp;t\u1eeb 2 m\/s \u0111\u1ebfn 8 m\/s trong 3&nbsp;s.&nbsp;L\u1ef1c t&aacute;c&nbsp;d\u1ee5ng v&agrave;o v\u1eadt b\u1eb1ng<\/p>","options":["<strong>A.<\/strong> 15 N","<strong>B.<\/strong> 1 N","<strong>C.<\/strong> 10 N","<strong>D.<\/strong> 8 N"],"correct":"4","level":"2","hint":"<p><span class=\"math-tex\">$a=\\dfrac{v-v_0}{t}$<\/span><\/p><p><span class=\"math-tex\">$F=m.a$<\/span><\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong> 8 N.<\/span><\/p><p>Gia t\u1ed1c c\u1ee7a v\u1eadt: <span class=\"math-tex\">$a=\\dfrac{v-v_0}{t}=\\dfrac{8-2}{3}=\\dfrac{4}{3}\\;(m\/s^2)$<\/span>.<br \/>L\u1ef1c t&aacute;c d\u1ee5ng v&agrave;o v\u1eadt:&nbsp;<span class=\"math-tex\">$F=m.a=6.\\dfrac{4}{3}=8\\;(N)$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-02-21 08:54:27","option_type":"txt","len":0},{"id":"7609","mon_id":"1158790","chapter_id":"1158796","post_id":"8477","question":"<p>V\u1eadt kh\u1ed1i l\u01b0\u1ee3ng m = 2&nbsp;kg \u0111\u1eb7t tr&ecirc;n m\u1eb7t s&agrave;n n\u1eb1m ngang v&agrave; \u0111\u01b0\u1ee3c k&eacute;o&nbsp;nh\u1edd l\u1ef1c <span class=\"math-tex\">$\\overrightarrow{F}$<\/span>&nbsp;nh\u01b0 h&igrave;nh, <span class=\"math-tex\">$\\overrightarrow{F}$<\/span>&nbsp;h\u1ee3p v\u1edbi m\u1eb7t s&agrave;n n\u1eb1m&nbsp;ngang m\u1ed9t g&oacute;c g&oacute;c &alpha; = 60&deg; v&agrave; c&oacute; \u0111\u1ed9 l\u1edbn F = 2&nbsp;N. 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M922K7E\/mRdlKNdCnX3+06jgZB7auw7alE5Er6+Mo1mAEFhwLRwRf2k3FjLIJlYZhJdP+\/fsxdOhQFC9eXMzh\/fv3l3PErwRfcTrHwfy8G0KBzIhGZIQ\/BjfMj9dz58IbjSfg7617EBBwGltXrsGq0V3R9sMiePSRrKg7YDH8QqIQIxkkvAqf2mATKo2DpPL398cPP\/wgxxjzdXS+\/Ddt2jQ50lhfV9L337lhiBOsdHJNHov46Mu4sOMHvJP1YTySISdGbrkCxwsdQExYMFb1rYMiT2bDw+mege+ULbgeGePoBOJv\/3UPb4FNqFQCZ9FNBJrwkxwcedatW4cBAwbgwyof4oMPPsBrr72GZs2awc\/PL2EHuXFtYnMuT7CSSXKJj0NcqD\/8pjRCdp90eDRTPuyKBGQvulHOxuGN8F6GjHgoYyFMXnkYt6J5hFhCvAuEbPpalffBJlQqgOtY4AaaNHPU4ZHF06ZOQ4UKFfDmW2+iVetW+O233zBz5kwMHz7cMW+6aJk33QXcESr2uj\/2jKmGrD4P47GshXEoDnAcwe\/AhiH1UTRbNuT8oC9W7L2IaCfTnwU6mWxC2bgbJItQBi4HXZZjutq2bYtyZcvJ2tLo0aOxbds2mUdx3Wnu3LlyvPGqVavMt2rvFlZCiaOy0NM4OLURcvg8hMeyFcLheAehGEcs8\/0QBZ\/KgXdaLsOW0xGISUrTswllI6WQHEJx5\/fB\/Qcx4fsJqFK5iriE+eyzz4Q0jNNBk3njxo1lfx6tfikBt4QKO4Pza0fgpYfSIX2mFzErIAr0mxFPg8XNk+hY4WU8nTEDyny5FQeDY2UNSs6fcPfKvE0oGykJoRINB8anziuuK61csRKft\/gc77z9jizQ8sAUbhtinFyvrUsdP35czsjr07uP7Ii4N4hHfHQows9uwid5suCh9JlQbsxOBBnbAc+sHo7\/ey4D0qXPiiaj1sLvbChuRsYiLCwCUWKcsObnCp3A3gKbUKkEuhVOEYrq2+bNmzFsyDB89OFHKF2qNDq074ClS5bKKUS6kUERioGvqW\/buk182fIcCHVIf4pCLHVxiIm6hpXfdkT14nmROV8N+A4Zg+\/GfYM2H+dHhU+bo2WXARg3dACGjfoa435chONnLiP8lmdCWUdEb4FNqFQAq0mbu7551t3C3xfK6+hv5nsTZUuXxbhvx+H0qdMJ5DHOdLAGgqrewAED0aZ1GzljPKVJJWobq0y\/SyFHsPGXUSiQ\/z0UL1UKVat9jJIfN8TP647g9IUQ7P5lANq1aYKGPUdjX0AQImIcfm2Tgk0oG3cOTWr4Bi1N3twqVLJkSTltiKPSiuUrcCbwDKIio8xRLKnAEYyvaXTq2ElOKqKrGCnK09CQTCQQml+iEBFyFsuWLMSSxb9jxcqV+GPDbgTfiJXbirjoh23\/rsffOw4iOOwWotUu9CRgE8pGokjM0KCDa0bHjx0Xs3eLFi1Evav7aV18PeZrOe9BHbSvj0L6dz2wuLDQMCHS0MFDMf778abfWuv1dwpHOXeWT3IuswllwzPcSAeJEhwcLHMeqmjcMvT2W2\/L\/IcnEOn+Zp1IkxiMMiJvReLksZMY\/914dOzQEbt3705IktT1icGThFsIpr6aweVy518S0qpOwYi7C+LeC9iE8iZYhJGCc+7cOUydOhV16tQR95l8AXDK5Cnib8l8X8mULQ+E0mSUROWh\/jOmzUDtWrVlR8VdwZURlnhnBt0+odQ1NqFseIKrNOHKlSv466+\/ZAMrz78rVbKUjErr160X657T5e7UOiusZcQD0VHRmD9vvngUXLFihfWK24M1fytShFDa\/VmDl8AmlBdAt+DRpB0QEICfZv0kr6G\/9uprqFmjpgg+9+Y5hMlZ3qzCpgjlRCyrxHKUionFsiXL8GntT7F48WIxeOjXWMlpzd8J1vzN340vFgJY+WBeyjg3GbrcnzV4CbyOUNaGUw8v0QeZDLjLz1sgdTIIxSOO\/\/n7H\/Tq2QvFihZDqRKl0L9vf6z7Z51Y4RKEySFn7u5J\/417+lwO6jeuk8+4eKxZtQaNGzbG7Nmz5dBK6\/X6d3fBUaZzEQqSxuIzV\/2e8H\/Cd2ve1nJcr3WNf9D4zxHKm6Dqw\/10O3fsFGtbjWo1UKRwETRu1FjM2pxDuYN5Pwa53CHJezYEefeu3Rg0YBDmzZsnx4fpJHJK7vG7c1BpXNMlUh8NyUmjQ5Vzu9fdC3g9oTh55vYZ7ow+f\/68uJTkpx4odIkFdY0erGkeRKDw8p64QPvvln\/RsllL5HkpD959+10xhZ88eVJcxQRfDsaF8xdw\/tx5Sc9RRF+E5SjD8x+4u5zpmDfvOehyECJuJuztJlGoTvI4sLNnzkp+\/GTZ06dOF6MEX39nOqp+LIdtxfqpenKU5KKyejZMK2VfuiTxLJufZ86elU7C9JnL58gd8JcumffPvAMCAiVP9RqJ\/rz1tmKely8HiytRNeLyk9+5nnb2bEI63h+v1\/313k94NaEIHm+1bNkyfNH\/C\/Tu3Rt9+vRxCvytV69eZujdq7dT4H61vn37om+fhGBNc7fBXblOgfXu3ccM\/G3AlwPwxRdfoHv37rKeVLxocbRq2Upeq+BuBwr6DxN+kHRUAXv26In+\/fpj8aLFCLoUlKAmhofL\/IdxrEeP7j0kf7rh3Lp1K2KiYyQdzeR79+zFN19\/I35ve3bvKW47O7TtgAH9B8haFolEQaSwc49fv3790N23u3wy71mzZsniMdMRNI4sX7Zc3gL29fWVe\/H17Y5evXtLWRHhDkLzWYaEXMWwYcMcdezRQz47d+4sozDrpkbMGzfCsXTpUnm2zI9p+clOZvfuPebueKrH\/\/77L0aPGi11ZH5MN2LECDGwcKnhQYxYXkcoqwpz6uQptG3TVrbX0GTMw+p5HkL9evXNz\/p1tVCvPhrUa2AGibcEPT4lglmPRIKkq58QGjVoJL9XKF9B3MG88MILQphjR4+JoYBYtGiRnEZUpkwZ2RHB19bLly8vm145sijVjKPKt998i4oVKspib+mSpVG+XHk0bdIUy5YucxxOGQ\/ciriFtX+vRfOmzYW8TFumVBnUrF4T3439Tg64JDj6nTzhWJ+qVLESShQvIXmyrpzPsY5CUnZ2V69h4viJ4taGVkhaI5n24yofy2Zd5emd9eToybIqlq9oWi3LlC6Dbl264dbNW45RivsTw27gu3Hf4cPKH8p9My3TNWncBH+v+dt0l8MRlHsWGzZoKPfCey5RooQsL3CZgSOW8pyod9D3Gt5HKAXjRbl9e\/ehSaMmsvhIKxcbn0JEVYGBI9j1a9fl4V6\/et38\/34GVReXEOII1vRUSajKUUA++fgTfFrnUxw+fNjp9qnK8N75HtPGjRvFMLFlyxaxALJHV0LC\/wP9A7Fz+05xgLZ542b8u\/lfHNh3ACFXEk4wosCyLpyr0RDBdAx7d+\/FuTPnEHXLsQ1cVMOImwgMCMSWTVuwbu06bFi3QdIeP3rc4SDA2BrEkerCuQvYt3sfNm3YhI0bNmLLxi3YsXWHvJdldoyGRXHrv1slMD+m37ZlG04cO+EwnsQac7fYeOkwtm\/bjg3rN0jg\/ezft1\/aTKlyNPlTHjiysp7Md+3atbLDnioqRzL99f77Ba8klOwBi4uXRtv+73bp0amqyT61NAI+bApt689bo13bdjhx4oT8rohCAWRvTMJQOCjk\/M420QVF5jzRMZKO8ZLOCDLXUiM+z72LiRE1jYEdE9OwTWVUNNJQoPmd5TCe6Zg3d2QIkS3nTlDASUZVP5VvbLS2FSrWcU83wx31oprKz8ibkVKOSqfKl7Jv3pQ5EtVG5snA+zRHHJ7hFxMr9Ze4mBhH+ogI+V+N4Gbe9wneRyjDnMtAdWXXzl1o3qy5zAvYWG6hCU1qAB8whUbU2dZtZcf4kSNHzDgXAUjk3kzhsqZXsF5n\/W793QhqBHILZeZOLC8DZh7qeSZWRyuSkUyROtl53kd4D6EsD5WBvR\/VHhKKE\/PbOxr4PsJN3Z2CG3D0oLuYZk2biYlcJ5QLkpGf1+BO6+jpHj3FewlSDaF69+xtWo28Dm7q7unhc4Ti7nESqkmTJjahPN2jp3gvwYMnlLWhtEAdOc0SKlojVOM0QKi7raOn6z3FewkePKEIraF0\/VwItSftqnyKUB5VPsJDfg8cybjnJOHpek\/xXgLvIJQGnVC01nCB0IVQqaRxk4KaQ\/FkIp5A5JFQ7nAP7z9hi2riJy0lheSc1JQWYRPqAcHbCaVwp4SwCeUlsAmVjBu6D\/d\/t4S42+tTK7yOULqgJItQqRQk1NGjRx2ESs4cSodNKK+FVxOKC7t7du9Bi+YtvNvKZ4FVmKx\/BO+NJGratKmr2dxKGCWPiRHI+J3XquACd\/klB57Se4r\/j8GrCcW1Gu41a9m8ZZoiFAWeoy+3GzVu0hiNGjdKmlAJGbsXXuN3m1APHl5PKI5QSuVLS4QSs\/nx4zI6uah8VuG3Bgt0IqUYoTyl9xT\/H4V3EyramVBeuw5lgQuBLH8EN7xyh3nTZk1djRJWYbUGN0iSTIR2faJpdHgq01P8fxQPnlCWB6M\/bNl6tG+fzKH4Apk5QnnZw9SJoj49Qax8x48Joeo3qO\/y+oYOd4S0kUzcZxnxOkLpN09C7d+7P1URKrmIio4yCdWwYUObUPcK91lGvJtQxl4+byfUnUAfoWxC3QM8IBnxOkK5qHzcHNu8uVcTShfy5Aq8Tah7DE8y4u63FIB3EEp9uiEUVT4xm\/fq7X5h9x41zL0G16G4U4LrUDwXISlC2Ug9ePCEUtAJZZDEJpSN1IYHTygLOf4rhFJ7+WxCpS14HaF0gtAooRPKW+dQdwL9FfgGDRrYhEojcCaUVTjv93cL9IXdnj17ul\/YteZxt99TEjrp9aAt7Lp9BV7VyXpdYsETrGnS4ndP4T7hwY9QSYD73fbsSX07JUxYH6oRSBqOvjz1iK+\/u2w98nC9S7Dh2ibWcJ\/g3YSKjkmVW49cHqYlkDTsLHhCK8nkQig31yQZbLi2iTXcJ\/g4FWYt\/H58TwI8xJDeIagW8ahinmctsOZxt99TGqqMxAIghzMe8jskZ\/LxeOm7IpSRp0vZ1t\/S+vekwn2C5xFKr5C7inmKv01YN25yR3aXzl0wePBgx0moyUEK1+m2YX2Yeh20tTYey9yxXUc531s5jfYaPOg2tOIe1UcdqppS8JEzpY1M1YHteuWp66tgerjT42OTiOe\/Rt4qf\/MoX72B+K9xHfNR7k34ybOr27Rpg359+4nKx9+oCvJTBafyDHXKrLfpUiUhON2z1SHZHYD1YZkqCLT7Y0egTk\/lKyn8VEcxt2\/XHs2aNMORw44RyrxWA9Nb2zWpoO5Lb3f9Oao21p+N0\/W324ZWuUlGvDUkmT45cqbtttePYVbgb5JHrON6GoWU04OUhA\/dpuhhx7YdToHex9Uh7\/zfUzwPedfj+bue\/\/atCfHm\/9sdgQfZMw+qeTwcnv\/TCRk9NVAt4ncKHvNkOWbQ89y23alOepwqU6+PpNm+\/e7CVueg2kEFaVfj\/nigv99BP\/mdrlzo9rNG1RriufDokaPyQqVqDxX0NpX7scTr98fA8p2e6fYdkq8Ku3bswpbNW5zawKmN7qANrXXQ46UOlnhr8JTeKmfWeLruoXsbFaTNLHKl8t60cZM4YKCHDivx7hY+zz7zLJ7L9Rz4yfBMzmfwzNOOkPPpnHj+uefxwvMvOMJzL5i\/q0+6Y9HT5Homl3k9A7+rwPwlnmXkdFwveWnfc+XKJfnlfiG35J01S1Y88sgjyJIli\/yul8X\/mUavD\/Mx6\/v8C3ju2eec4qUMrT68d70uelD1kvicWhz\/177r9WGQ359KiH\/22WfxYu4XJci9PZ9bys+WNRvSP5IeDz\/8MHLnzo2X87yM555z1EfaT5WvtblTnVR9WJZRHn\/Xn6lq76efetoMzEc9b\/XMVf4qD72tn3\/2eadnyniXNtTal0GP18twFxin19eUEV0OnzXqYtTLWmdew2etgi5nZnjmGZEvue6ZZ8T3FFVtcwROAfikS5cO3hx8fHzMYI1L7SEt31tqCPTqwoNUU1L18+FIkCljJmF6iWIlxGlV4cKF5bNixYooWqQoHs\/0OJ7M9iTeyvcWihUrJoG\/M9ApV\/FixWUkYShYoKA46VLx\/L9ypcqSjqPJo48+ildefgX5P8gvTsQYT+fMZcuWlc+XXnwJGTNmxMsvv+xw3FyqlIQSJUtIua+99hqyZM2CJ7M\/iTfyvYHSZUqjSJEi4pe2bJmyKFeuHPLmzYvHHnsM2bJlk\/R03FW0aFEJvK\/KlSvj3XffRfr06ZE9e3a8\/dbbUo9yZctJmXQuxvDB+x9Iw2fPkR35C+RH4SKFUbxEcRQuWFjSVqpQSdosQ4YM0oYvvvii1KNQoUJyb3SWxvvi\/5kzZUaGxzLg\/ffeFydirAvbjU7UGHiPHMmkfV55BQXyF5B0KrC8woUKO9ow\/aPSWxcqWEicjTEfOjpjfd54\/Q08kfUJ5MieA3lfy2s6N+OzoLOz6tWq47133pORkeneeOMNiWcebEfmV+XDKpI3n2fmxzPL6Mnf1TNl2soVK6Ns6bLIkjkLMmXIJO38\/vvvOzmIY3j99deR\/tH00kZsC7mPwoVRqkwpeVZM8\/wLz+Pxxx9H5syZpV34uzzTIkXkGpZNOWU8nymfHZ8j45m+UqVKIl8v5X4JGTNkFFnN\/35+lCxWEsWKFJMgzuhKlZb2yfZENmTNmhW9evQSX1Qpqfb51KpZS1wq\/jb\/N\/if9pchkP5d6diLW2P+\/ONPeRCjRo7Cwf0HZTGSh4swnD59GgcPHsTvC36X\/WgDBwyUY7\/o0pLHDDME+AfgxPET4mSLvpDatG4jnvQkzfHjUgb\/P3n8pDjOGjp4KFq3ai15sj4sh2mo77JOo0ePRt36dTFn7hzs3bdX6so0zIv14Ru+Y8aMQdWqVbFgwQIEBgZKnbnmw8A0zO+nn35C6dKlMWXSFGnUQ4cOyc4F1vlMwBnRuydPmizE+m78d7hw8QKOHjuKQ4cPSRoaFPhJh2AUErrk5PzO\/5S\/5M96sWweFTZ\/3nzU+7QeunbuKkYWf3\/\/hPYJCJA6\/bniT3Tr1g3t27fHP2v\/cdT55EmZb7EN6Ypz0cJFsnzg280Xfyz\/Q35nOs69eA9nA8+Ky0++PzZn9hwp69SJU+LUjPfOPHjNlMlTxOvgzOkzpQ58Pnob8t4W\/r4QdWrXwYhhI+S++IyYjumZV8DpAJnP0Ml2l05d5Fqa\/nnvBw4cEEd4u3btQvsO7dGufTtMnz5dylZtwrakF0L+X\/nDyuJSlH5+VR34LCiL9MvLa+iUjq5\/Vq5cKW2i6stP+tZl\/ejpstXnrcShHO+bgXLFoMoeNnQYateqjR9n\/ij3wOWLlIQPF0xJAjrUEk9ylrDt322YNWOWNLJY1yzxXBuidz36fpU0hrMrPVBHZRmLfl+EPbv2yDXWNAx0N0k3j5w00vueHsdehP6h6E920uRJuHb9muRrzYNe+lavWo2FCxeaDpataZgPjQlz5syRB880ygKk0vBhr\/xzpbjVpMdElY+1TO41nPvzXBE0d\/fOQE+FC+YvgN8BP3FaZo1n4KSZZdEgQw+H6ne9PE6oKeh8R4yeBPXrWT\/m\/ceyPzDvF4dHd2tdGdj2JOzPc34WX7rWeAbmwwX1qZOnSodpjWegtY3eC+fOmSveE53iDFec9OI4YuQIbN+x3a18EWxnksnPz0+el54HP5kPna+xkyTh6CzOel9Mw3xmz5qNVX+tkuUIa1kMlF8+Uz4L3a2qsiSmBHz69eknDFcmR2WGZIMNHzYcn3zyiQgfhVDSaHZ7CuOkiZPEXyxHHTaaykcNo2yMRQsWoWG9hpg3d57DpaQlDU2Yu3fuRsf2HcXZMl09qjJUfeh4jUeJ0Xk1rUzK16qOnTt3otlnzTB0yFBxqek02TSyO3PmjPSojRo2kpFC1UGZjtnI7OnpXJo92cXzFxPS6G0E4Kcff0L+9\/LLAq3Sw1UbESTGLz\/\/Iv5iN23aJO2jTLwKbFcShf6DSQQKhrUcEvqvlX\/Jjgo6sr5y5YrEi0AYZdEqymfJEZ6WPHMRXAM7LKahRnLk0BHpnVU5Kh+WNWPaDNmdQksZBVhgPAemY9uzPjVr1MSKP1ZIJyZJjPviMgG1Dd+uvujcqbOMjCpeEYmY\/dNs1KpRCz\/P\/llciFrvm2BnzdGU902NRZYltHiCHQT9K0+bOk2821N2CV3GOELRUfeYUWNw9NBR0\/9vSsOHN6sETxcuDokDvhggQ7XqxXVBYKU5clHV4QOgX1NrGmLZkmXiZXz82PEy9Kp4s3cA5MFRtRg1fJSoWuZajgGSY8b0GaIKUjVVazmmcMZDRoiRI0aKY2WOUPqDU+Ww16YzZqpNvD\/pSZU3PEOgKNCDBg4S4tLDOe9Tbxf1MNkz9+zWE9OmTENoaKhzfQxMnjgZ3bt2x+zZs6Vs\/Z4V2BH1799fHDVTfVO9uy40HOHosX3C+AmidlkXuNk+JHeHdh1EvVSjl57H+fPnhbBUF6nyUaCc6hLv6CBXrVwlbUjViD5tzboYSXkdNQh6sOfIQpVVb2uCI1Ov7r2kPiRxdKTxvDRQNWTbdO7YWTowUwa1RVY+08EDB8s0QUb3mw7fwjrYkdDpNj3bUwsSMjknkZGYnTlVRrZPWGiYSz4pBR+r8BJshBrVawjj+bBUg+mVoB79eYvPRWdnz6EEQaXhNZeCLuGLfl+IMHDtQ\/lT1R9Q6PVQTPh+Atq2aisP03TIbAgvnVBzPtW1S1dM+mGSjComtDzYy1F\/Zo8mPaYiiSHk7FWpDjRu2Bi\/zvsVQZeCnPPRDtasXrU6pk+d7hhR3CA8LBw1PqkhHcW1kGvOoyk7m+hY6Snpcb1Prz7yv2pD8zM2TnplCkyH9h1EMFRHIVqA1gnQ8zvvbf369Q7B04jLOlLdpg9imRf4B5iLpOq++Iw5R+vQtoP09Jyb6URhWtaLqmTfXn3x9Vdf48D+AwlE0WSPIzyFt3fv3ti7d2+CFmDUiaRcs2YN2nzeRjpcvb4qPxLOt4uvGAVW\/7U6wc+uRiY+00FfDpJRZfnS5dJJqPqq+vC6r0Z9JfXhs6VGoNdFYf78+TJa\/jj9R4cRQisnpSFbj\/Sek4aHL\/t9iZ6+PWW+Y+0NCU6C+\/XrJ6PT1i1bzeHTfEhGj\/jt2G+FCEsXLxUh1wWFUOoFeyrq9BQ8PQ+Si4LGeR7VPU48rQLFh0OB6tShE74Z840QxeydjcAdFvRm3q1zN\/Twdaw9WNNQf6eDbArd4AGDZTQVaGXxkx1Jl45d0LdnX7l3aTvLfbFnpUANGThEvKfzPtT1Kh17SZKAqiWFnSOjWZaRFdNwpOD9r1m9RjoXlQ9BMh09fFSew5DBQ2T0svbQTEOiDB40WNKJemqoTaosqqvsFCeOn4h2rduJAUmeu0E2gteQrDRktGzREgt+W2DKhpIfCjhHL1oSOZcLCXZ4oReCG\/dOdXXVqlUoX7a8kElNJfR2ZnvR83vdOnUx\/9f58ozNdjHujXPsxQsXo0XTFlIn9dz19mP9Dh86LLLat3dfme+aWsndb5BxCx9TxWCvEBqKkcNGommTpqLXs1fXhYBgI038YSIa1m8o6gp1dcbr+bA3WbF8hQgVRxf2WnKz0mqOfDhv4sSX+vzYb8fi3NlzJllUGsYPGzJMVDnOoZzIbZCAujrz4NyLhJNtKyqJ0duTBJw79OjWAwf2HXDeumJsa6F17qsRX8mows5Ajdzq\/hmuXrmKOT\/NQa3qtbBz206TKIQqNzg4WEZAWr8omCSz3n4EhYFqKddBfv3lVxEyq4rGNlu9erVY\/ajuUmCsPSutbyQc24dt5W5eQCvY6FGjRX2nOs12J\/Tnyrw5IlOTYMcTdt3R0+v1Zu9PKyMtiBwNzBHeIIJyMM76sMOhmqW3HcF7pKpMa5xoCUFBCXHac2Pn0bFDR8z+cXbCvMkoS4HW1U4dO0nbKGMY89IHBz73IYOGYMzoMbJjgvNB87lbQwrB3G3OB\/\/HH3\/IhH30yNFu503s7dgzsacjCS6cv2D2ziode8hVf67CwP4DpYem+VPitVrzGi6ofT36axn2N2zY4GJAoKWGk1bq2CSnstipbORMhiPH8P1338twzoesqx8EH9LFCxdFf+Z9sfHZi8q8yBBO5hkcFIxJEyZhyIAh8sBNVUcTKk7gqX+TmOztzFFHU60IWpoGfjFQ9HplHbS2I03eX\/b\/UgSdKqxensLy5ctlU\/C333wrGoHsB9TamO1DNbdFixYi6Gb7GGCeNO7QskrhnDlzpqQxYdRZWf2ogo0aMQq3Im45nqk2X2THSoHk3JJ1omCqOqsyOYoM\/HKgCDlHbr1DImKiYqTTJNlaNGsho6\/TNMGoz\/Wr18UYRkMEO0ghiqUjIVG+H\/e9kFupnVYtgW2\/ZPEStGnVRiyjYjmN1+aw6plpzy4lICofG2zLli2yKMeHRCFUPYa6YTYi1xca1G8glj3a9K0jCns\/Wo8ovNR\/qYfLg9aOv2IaGkJGDh8pk1ZOuK0WO87buM+N6iJVQWUlUmWRFGf8z+CH8T9IHtwHJ+qF1kCsGwWKKkOdWnXEOMKHLtkYja\/mMUsWLZH9dL\/P\/11GaQXz3sNuyIT34yofY\/y48a7zL6ND4kS7Tp06MspTeKyjDtOwg+Ekm6on176svS\/biybkvn37ysZZmtOV+mXmcyNcDBQUbhppOBpYhYN1njVzloy4bEs+LyuYL+ecLIcCymfH6+W+DSHmPXDdhxZGblCmOqt3fvyf8yoar\/gqCue5+shNMD+uCXETcP8+\/bF+3Xon4TdJGXJVRkneF9U507KsOpLYWLlXaiQkLqcSoipbwDpzDZGqKQ0wuolc\/tyNUikEIRTVAhoGOnXqhEMHD7kQheC84\/vvvxcVjFY5dyZgCidHA07W\/\/rzL+mFrODIxziOghz2aR1UYF7Ml8LL3pCLuFzkcxI6w1BBXZ0mUI4Ely46LGg6SFKu6VAV5PyBqoNZX6PKonbu2iOq3vDBw2U+IsVovSbz5bUc3Tp36CwbMU1o7cMHzdFy4MCBUjd9RFVtxDSTJk3CsGHDsHLFSsckWgmwkYYjD1Vqzq848lAdlKKMToBqHYnIe6JlkFY2p9Hd0CRoWKLBaNCAQUIIaxp2ShQ0agGc+HOuZ6rUxn3xO9MsXLBQFqVNLUC7b97n5s2b5Z01dsbSzhpYZz7z9WvXo9rH1bB2zVpzMVWXHXY2nOs1qNdA5ELm3PpoYrQNRz+OclwjU+toKp7pWR8SnJsMqOZycVs3vDnlqYcUghCKoxN7cr5urtaSTBj\/0jgwc8ZM7N+\/Xyww1iGf4NyDPSbnVuzF1XqADo4aXLvgyESV0bT8GQgNC5XdDlyY5fqX00M2AvOg0JKYFBy1oOqUT2io7Dqm6sQVfPZ2kk2cY75HyPrX7t2yVkSzrFqX0f+YLyfjbB92JMowYAUNArTYce5p6uoKxr9sH078WXd2PlYhJzi\/4ojCEVXa0JKGczT28FS9KYDm6K4JBonK+QyJsHH9RnOdSG9DXsfRhs+CgfWRJFq9OdJwzkmicM4SdDFh3sTAtoy4ESELuzT9s3PUlxkIth\/XOdetXycL6aqDsIImeloxJ0+eLCO9O+szLZ40aFDGuEtCV4PVJ0dmLkbTskeiu3TqWjvdC\/w\/DGMZorQdv9kAAAAASUVORK5CYII=\" y=\"1\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> 1 m\/s&sup2;","<strong>B.<\/strong> 0,5 m\/s&sup2;","<strong>C.<\/strong> 0,85 m\/s&sup2;","<strong>D.<\/strong> 0,45 m\/s&sup2;"],"correct":"2","level":"2","hint":"<p>&Aacute;p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt II Newton: F = m.a (trong \u0111&oacute;&nbsp;<span class=\"math-tex\">$\\overrightarrow{F}$<\/span>&nbsp;c&ugrave;ng h\u01b0\u1edbng v\u1edbi&nbsp;<span class=\"math-tex\">$\\overrightarrow{a}$<\/span>).<\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;0,5&nbsp;m\/s&sup2;.<\/span><\/p><p>V\u1eadt chuy\u1ec3n \u0111\u1ed9ng theo ph\u01b0\u01a1ng ngang n&ecirc;n \u0111\u1ed9&nbsp;l\u1edbn c\u1ee7a l\u1ef1c theo ph\u01b0\u01a1ng ngang l&agrave;:<\/p><p><span class=\"math-tex\">$F_x=F.\\cos\\alpha=2.\\cos60^0=1\\;(N)$<\/span>.<\/p><p>\u0110\u1ed9 l\u1edbn gia t\u1ed1c c\u1ee7a v\u1eadt:&nbsp;<span class=\"math-tex\">$a=\\dfrac{F_x}{m}=\\dfrac{1}{2}=0,5\\;(m\/s^2)$<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2025-02-21 09:01:18","option_type":"txt","len":2}]}