document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1187331>Question 1187331</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the rock is dropped from the second floo which has a height of 128ft, a) how long will it take to fall half the distance to the ground? b) how long will it take to fall to the ground? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #818281 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=818281\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the rock is dropped from the second floo which has a height of 128ft, a) how long will it take to fall half the distance to the ground? b) how long will it take to fall to the ground?<BR>\n" );
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document.write( "128 feet is unusual for 2 stories.<BR>\n" );
document.write( "Using 32 ft/sec/sec for gravity:<BR>\n" );
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document.write( "a) how long will it take to fall half the distance to the ground?<BR>\n" );
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document.write( "s = at^2/2 = 64 ft<BR>\n" );
document.write( "16t^2 = 64<BR>\n" );
document.write( "t = 2 seconds<BR>\n" );
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document.write( " b) how long will it take to fall to the ground?<BR>\n" );
document.write( "s = at^2/2 = 128 ft<BR>\n" );
document.write( "16t^2 = 128<BR>\n" );
document.write( "t^2 = 8<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+2sqrt%282%29 ALIGN=MIDDLE  ALT=\"t+=+2sqrt%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > seconds </SPAN>\n" );
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