document.write( "Question 1161026: A stone is thrown straight upward and it rises to a maximum height of 20 m.\r
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Algebra.Com's Answer #784437 by ikleyn(53751)\"\" \"About 
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document.write( "In Physics, they write the Energy conservation equation\r\n" );
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document.write( "    \"%28mv%5E2%29%2F2\" = mgh     (1)\r\n" );
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document.write( "and then obtain from this formula (after canceling the mass \"m\" in both sides)\r\n" );
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document.write( "    v = \"sqrt%282gh%29\".      (2)\r\n" );
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document.write( "According to formula (2)\r\n" );
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document.write( "    v = \"sqrt%282%2A9.81%2A20%29\" = \"sqrt%28392.4%29\" = 19.81 m/s.\r\n" );
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document.write( "You can round it to 20 m/s.\r\n" );
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