document.write( "Question 1206775: Two friction wheels are of diameter 20 mm and 200 mm respectively. They touch at P and rotate without slipping.
\n" ); document.write( "Calculate the number of turns made by the small wheel when the large wheel rotates through 60°. \n" ); document.write( "

Algebra.Com's Answer #844407 by ikleyn(52778) $\"\"$ $\"About$

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document.write( "The invariant is the product  ,  the radius times the angle.\r\n" );
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document.write( "So, we write  \r\n" );
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document.write( "      = ,\r\n" );
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document.write( "or\r\n" );
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document.write( "     = 100*60.\r\n" );
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document.write( "From this equality, we find\r\n" );
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document.write( "     =  = 10*60 = 600 degrees = 360 degrees + 240 degrees,\r\n" );
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document.write( "so the small wheel will make one full rotation and 2/3 of the other rotation.\r\n" );
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