document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1194440>Question 1194440</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A quarter is dropped from the top of the Eiffel Tower.  Determine amount of time until quarter hits the ground.\r<BR>\n" );
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document.write( "Height of tower; 984 ft.\r<BR>\n" );
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document.write( "Quarter mass; 5.67 grams.\r<BR>\n" );
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document.write( "Check my calculations, please.\r<BR>\n" );
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document.write( "S = 16t^2\r<BR>\n" );
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document.write( "984 = 16t^2\r<BR>\n" );
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document.write( "984 - 16t^2 = 16t^2 - 16t^2\r<BR>\n" );
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document.write( "-16t^2 + 984 = 0\r<BR>\n" );
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document.write( "-16t^2 + 984 - 984 = 0 - 984\r<BR>\n" );
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document.write( "-16t^2 =  -984\r<BR>\n" );
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document.write( "-16t^2 / -16 = -984 / -16\r<BR>\n" );
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document.write( "t^2 = 61.5\r<BR>\n" );
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document.write( "Taking square root:\r<BR>\n" );
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document.write( "t =  + 7.84, - 7.84\r<BR>\n" );
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document.write( "t = 7.84 sec.\r<BR>\n" );
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document.write( "Not sure if I used correct formula.\r<BR>\n" );
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document.write( "You used the correct free-fall formula<BR>\n" );
document.write( "S = 16t^2<BR>\n" );
document.write( "t = time elapsed<BR>\n" );
document.write( "S = approximate vertical distance traveled<BR>\n" );
document.write( "You also have the correct steps and correct answer. <BR>\n" );
document.write( "The mass can be ignored entirely, as it plays no role in the free-fall time.<BR>\n" );
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