document.write( "Question 519683: sally gradually accelerates from 0 mi/hr to 55 mi/hr in 7 seconds find the acceleration of her car \n" ); document.write( "

Algebra.Com's Answer #345736 by Edwin McCravy(20056) $\"\"$ $\"About$

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sally gradually accelerates from 0 mi/hr to 55 mi/hr in 7 seconds find the acceleration of her car.
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document.write( "That's a  or a 7.9 mi/hr increase per second, which is the most\r\n" );
document.write( "meaningful way to think of acceleration.  It means she speeds up by about\r\n" );
document.write( "8 mi/hr every second.  However in school they want acceleration in\r\n" );
document.write( "feet per second increase per second, even though the other is more meaningful.  \r\n" );
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document.write( "Most everybody memorizes that 60 miles per hour is 88 feet per second.\r\n" );
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document.write( "To change  to  multiply by \r\n" );
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document.write( "So 55 mi/hr = 55(88/60) = 80.67 ft/s}}}\r\n" );
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document.write( "a =  =  =  = 11.52.\r\n" );
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document.write( "Edwin

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