document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=180824>Question 180824</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the Variation Problem\r<BR>\n" );
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document.write( "THe force of the wind blowing on a vertical surface varies<BR>\n" );
document.write( "jointly as the area of the surface and the square of the velocity.<BR>\n" );
document.write( "If a wind blowing at 50 mph exerts a force of 75 pounds on a<BR>\n" );
document.write( "surface of 500 ft^2, how much force will a wind of 75 mph place<BR>\n" );
document.write( "on a surface of 10 ft^2? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #135582 by </B><A HREF=/tutors/aboutme.mpl?userid=EMStelley><B>EMStelley(208)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=EMStelley><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=EMStelley><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=135582\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Joint variation is represented by y=kxz (y varies jointly as x and z).  So if the force varies jointly as the area and the square of the velocity, we have that<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=kav%5E2 ALIGN=MIDDLE  ALT=\"f=kav%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So, if f=75, a=500 and v=50, we have that<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=75=k%28500%29%2850%5E2%29 ALIGN=MIDDLE  ALT=\"75=k%28500%29%2850%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=75=k%281250000%29%0D%0A%7B%7B%7Bk=0.00006 ALIGN=MIDDLE  ALT=\"75=k%281250000%29%0D%0A%7B%7B%7Bk=0.00006\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So, if v=75 and a=10, then<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=0.00006%2810%29%2875%5E2%29 ALIGN=MIDDLE  ALT=\"f=0.00006%2810%29%2875%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f=3.375 ALIGN=MIDDLE  ALT=\"f=3.375\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So the force is 3.375 lbs. </SPAN>\n" );
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