document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=329320>Question 329320</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Looking for assistance in creating an equation to solve the following problem.\r<BR>\n" );
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document.write( "The force needed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a force of 3600 pounds is needed to keep an 1800 pound car traveling at 20 mph from skidding on a curve of radius 600 feet what force would be required to keep the same car from skidding on a curve of radius 570 feet at 50 mph? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236022 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=236022\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ok, here's the equation:<BR>\n" );
document.write( "Let F = Force required to keep car from skidding.<BR>\n" );
document.write( "Let W = Weight of car in lbs.<BR>\n" );
document.write( "Let S = Speed of car in mph.<BR>\n" );
document.write( "Let r = Radius of the curve in feet.<BR>\n" );
document.write( "Let k = the constant of variation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F+=+%28W%2A%28S%29%5E2%2Fr%29%2Ak ALIGN=MIDDLE  ALT=\"F+=+%28W%2A%28S%29%5E2%2Fr%29%2Ak\"   DISABLED_style= \"max-width:90%; height:auto;\" > First, find the value of k.  Substitute the given values of: F = 3600 lbs, W = 1800 lbs, S = 20 mph, and r = 600 ft.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3600+=+%281800%2820%29%5E2%2F600%29%2Ak ALIGN=MIDDLE  ALT=\"3600+=+%281800%2820%29%5E2%2F600%29%2Ak\"   DISABLED_style= \"max-width:90%; height:auto;\" > Evaluate.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3600+=+%28%281800%2A400%29%2F600%29%2Ak ALIGN=MIDDLE  ALT=\"3600+=+%28%281800%2A400%29%2F600%29%2Ak\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3600+=+%281200%29%2Ak ALIGN=MIDDLE  ALT=\"3600+=+%281200%29%2Ak\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k+=+3 ALIGN=MIDDLE  ALT=\"k+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" > Now thw equation becomes:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F+=+%28W%2A%28S%29%5E2%2Fr%29%2A3 ALIGN=MIDDLE  ALT=\"F+=+%28W%2A%28S%29%5E2%2Fr%29%2A3\"   DISABLED_style= \"max-width:90%; height:auto;\" > Now substitute the problem values of: W = 1800 lbs, S = 50 mph, and r = 570 ft.<BR>\n" );
document.write( "You can work this out. <BR>\n" );
document.write( "I got F = 23,684.2 lbs.<BR>\n" );
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