document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=784441>Question 784441</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rollercoaster car decelerates uniformly from a velocity of 20 m/s to come to rest while covering a displacement of 40 m.  What was the acceleration of the car? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #477096 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=477096\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A rollercoaster car decelerates uniformly from a velocity of 20 m/s to come to rest while covering a displacement of 40 m.  What was the acceleration of the car?<BR>\n" );
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document.write( "v = at --> t = v/a<BR>\n" );
document.write( "s = at^2/2<BR>\n" );
document.write( "Sub for t<BR>\n" );
document.write( "s = a*(v/a)^2/2<BR>\n" );
document.write( "s = v^2/2a<BR>\n" );
document.write( "a = v^2/2s = 400/(2*40)<BR>\n" );
document.write( "a = 5 m/sec/sec<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );