document.write( "Question 1042973: a weight of 75 pounds is placed in a lever 15 feet from the fulcrum. how far from the fulcrum on the other nside must a weight of 90 pounds be placeed in order to give equilibrium? \n" ); document.write( "

Algebra.Com's Answer #658132 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "a weight of 75 pounds is placed in a lever 15 feet from the fulcrum. how far from the fulcrum on the other
\n" ); document.write( "side must a weight of 90 pounds be placed in order to give equilibrium?
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document.write( "According to the description, it is 1-st kind lever (1-st class lever).\r\n" );
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document.write( "For levers, see this Wikipedia article.\r\n" );
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document.write( "See also the lesson Using proportions to solve word problems in Physics in this site.\r\n" );
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document.write( "The condition for equilibrium for such levers is this equality\r\n" );
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document.write( " = ,\r\n" );
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document.write( "where ,  are the forces applied and   and  are their armes.\r\n" );
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document.write( "In our case 75*15 = 90*x, which gives x =  = 12.5 feet.\r\n" );
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document.write( "Answer.  12.5 feet.\r\n" );
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