document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=887059>Question 887059</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There are 2 cars moving in opposite directions. the distance between them is 300cm. They move forward for 100 cm with a speed of 50 cm/s, and comes back 50 cm at 25 cm/s. After how many seconds will the cars collide ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #536340 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=536340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 100 cm at 50 cm/s = 2 seconds<BR>\n" );
document.write( "50 cm at 25 cm/s = 2 seconds<BR>\n" );
document.write( "the solution depends on whether you consider a touch a collision.\r<BR>\n" );
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document.write( "if you do consider a touch a collision, then they collide in 6 seconds.<BR>\n" );
document.write( "each car will travel 100 cm in 2 seconds.<BR>\n" );
document.write( "each car will go back 50 cm in 2 seconds.<BR>\n" );
document.write( "after 4 seconds they will be at the 50 cm mark.<BR>\n" );
document.write( "each car then travels another 100 cm in 2 seconds.<BR>\n" );
document.write( "they have both traveled 150 cm at the 6 second mark.<BR>\n" );
document.write( "since both meet at the 150 cm mark, you can consider this a collision but it would not be a very severe one.<BR>\n" );
document.write( "they would just touch.\r<BR>\n" );
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document.write( "if you don't consider a touch a collision, then they collide in 9 seconds.<BR>\n" );
document.write( "each car will travel 100 cm in 2 seconds.<BR>\n" );
document.write( "each car will go back 50 cm in 2 seconds.<BR>\n" );
document.write( "after 4 seconds they will be at the 50 cm mark.<BR>\n" );
document.write( "each car then travels another 100 cm in 2 seconds.<BR>\n" );
document.write( "they have both traveled 150 cm at the 6 second mark.<BR>\n" );
document.write( "the cars would touch at the 150 cm mark, but you do not consider this a collision so they continue on their way.<BR>\n" );
document.write( "they go back 50 cm in the next 2 seconds.<BR>\n" );
document.write( "they are now at the 100 cm mark in a total of 8 seconds.<BR>\n" );
document.write( "they attempt to move forward 100 in the next 2 seconds, except that they never get there because they collide at the 150 cm mark.<BR>\n" );
document.write( "it  took them both 1 second to get to the 150 cm mark from the 100 cm mark, so they collide after 9 seconds total.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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