document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1204635>Question 1204635</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The force needed to keep a car from skidding on a curve varies inversely as the radius of the curve and jointly as the weight of the car and the square of the car's speed. Suppose that 640 pounds of force keeps a 2600-pound car from skidding on a curve of radius 650 at 40 mph. What force would keep the same car from skidding on a curve of radius 750 ft at 30 mph?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #841011 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39623)</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=841011\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f, the force needed<BR>\n" );
document.write( "r, the curve radius<BR>\n" );
document.write( "w, the car's weight<BR>\n" );
document.write( "s, speed of car<BR>\n" );
document.write( "k, variation constant\r<BR>\n" );
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document.write( "This is what the description becomes literally, in variables------<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=%28%28ws%5E2%29%2F%28r%29%29k ALIGN=MIDDLE  ALT=\"f=%28%28ws%5E2%29%2F%28r%29%29k\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Your question gives these as values and asks for so you can determine value for k.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28f=640%2Cr=650%2Cw=2600%2Cs=40%29 ALIGN=MIDDLE  ALT=\"system%28f=640%2Cr=650%2Cw=2600%2Cs=40%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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