document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=840153>Question 840153</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A man drove North on Main Street for 1,200 m. He then turned and drove South on Main Street for 1,800 m. His motion took 200 seconds.\r<BR>\n" );
document.write( "\n" );
document.write( "A) What was the distance that the man traveled?\r<BR>\n" );
document.write( "\n" );
document.write( "B) What was the mans displacement?\r<BR>\n" );
document.write( "\n" );
document.write( "C) What was the mans speed?\r<BR>\n" );
document.write( "\n" );
document.write( "D) What was the mans velocity? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505990 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=505990\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> r= unknown speed<BR>\n" );
document.write( "r is in meters per seconds<BR>\n" );
document.write( "time is in seconds\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "________________speed___________time____________distance<BR>\n" );
document.write( "North___________r_______________(___)___________1200<BR>\n" );
document.write( "South___________r_______________(___)___________1800<BR>\n" );
document.write( "Total__________________________200\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%2AT=D ALIGN=MIDDLE  ALT=\"R%2AT=D\"   DISABLED_style= \"max-width:90%; height:auto;\" > which means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T=D%2FR ALIGN=MIDDLE  ALT=\"T=D%2FR\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  Fill in the time expressions:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "________________speed___________time____________distance<BR>\n" );
document.write( "North___________r_______________1200/r___________1200<BR>\n" );
document.write( "South___________r_______________1800/r___________1800<BR>\n" );
document.write( "Total__________________________200\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Most important first equation to solve is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1200%2Fr%2B1800%2Fr=200 ALIGN=MIDDLE  ALT=\"1200%2Fr%2B1800%2Fr=200\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Simplify and solve for r.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2812%2B18%29%2Fr=2 ALIGN=MIDDLE  ALT=\"%2812%2B18%29%2Fr=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%2Fr=2 ALIGN=MIDDLE  ALT=\"30%2Fr=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%2F2=r ALIGN=MIDDLE  ALT=\"30%2F2=r\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28r=15%29 ALIGN=MIDDLE  ALT=\"highlight%28r=15%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > meters per second\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-<BR>\n" );
document.write( "(A) total distance traveled 1200+1800=3000 meters.<BR>\n" );
document.write( "(B) actual displacement, because he backtracked is 1800-1200=600 meters.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The speed was just solved, either direction, as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=15 ALIGN=MIDDLE  ALT=\"r=15\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "(D) VELOCITY?  This is speed AND direction.<BR>\n" );
document.write( "600 meters SOUTH in 200 seconds, SOUTH <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=600%2F200=highlight%283%2F2=1.5%29 ALIGN=MIDDLE  ALT=\"600%2F200=highlight%283%2F2=1.5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  meters per second. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );