document.write( "Question 952001: Rosa has designed a pulley system for a school science project. She has determined that as the coefficient of friction increases, the efficiency of the pulley decreases. With a coefficient of friction of 0.2, the efficiency of the pulley is 75%. What would you expect the efficiency to be if the coefficient of friction increased to 0.3?
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Algebra.Com's Answer #581394 by stanbon(75887)\"\" \"About 
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Rosa has designed a pulley system for a school science project. She has determined that as the coefficient of friction increases, the efficiency of the pulley decreases.
\n" ); document.write( "e = k/f
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\n" ); document.write( "Solve for \"k\" using \"With a coefficient of friction of 0.2, the efficiency of the pulley is 75%\".
\n" ); document.write( "0.75 = k/0.2
\n" ); document.write( "k = 0.75*0.2 = 0.15
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\n" ); document.write( "Equation:
\n" ); document.write( "e = 0.15/f
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\n" ); document.write( "What would you expect the efficiency to be if the coefficient of friction increased to 0.3?
\n" ); document.write( "e = 0.15/0.30
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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\n" ); document.write( "coefficient of friction = 1/2
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