document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1093647>Question 1093647</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How long would it take for a ball dropped from the top of a <BR>\n" );
document.write( "196-foot building to hit the ground?  Round your answer to two decimal places.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #708291 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=708291\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To answer your question, we have to use the formula to approximate the distance in feet s that the ball (or any other object) falls freely from rest in t seconds:<BR>\n" );
document.write( "s = 16t^2<BR>\n" );
document.write( "Now, you may wonder why 16, why not any other number. It's because the instantaneous acceleration, the acceleration of gravity, is 32 feet per second. The coefficient of the t^2 term is HALF the acceleration. When you get to calculus you'll learn how this works.<BR>\n" );
document.write( "So here we go:<BR>\n" );
document.write( "16t^2 = 196<BR>\n" );
document.write( "t^2 = 196/16<BR>\n" );
document.write( "t^2 = 12.25<BR>\n" );
document.write( "t = sqrt(12.25)<BR>\n" );
document.write( "t = 3.5 seconds<BR>\n" );
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