document.write( "Question 20896: A horizontal bar of negligible weight has an 82.6 lb weight hanging from the left end and a 43.0 lb weight hanging from the right end. The bar is seen to balance 56.2 in. from the right end. Find the length of the bar. \n" ); document.write( "

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A horizontal bar of negligible weight has an 82.6 lb weight hanging from the left end and a 43.0 lb weight hanging from the right end. The bar is seen to balance 56.2 in. from the right end. Find the length of the bar.
\n" ); document.write( "LET AB BE THE BAR AND ITS LENGTH BE L.WE HAVE 82.6 POUNDS AT A AND 43 POUNDS AT B.IT IS BALANCING AT C SAY AND WE ARE GIVEN THAT CB=56.2..HENCE TAKING MOMENTS ABOUT C WE GET
\n" ); document.write( "82.6*AC=43*CB
\n" ); document.write( "82.6(AB-CB)=43*CB
\n" ); document.write( "82.6(L-56.2)=43*56.2
\n" ); document.write( "82.6L-82.6*56.2=43*56.2
\n" ); document.write( "82.6L=43*56.2+82.6*56.2=56.2(43+82.6)=56.2*125.6
\n" ); document.write( "L=56.2*125.6/82.6=85.4566 INCHES \n" ); document.write( "

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