document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=188997>Question 188997</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Ferris wheel of diameter 40m has its centre 21m above the ground. The wheel rotates once every 30s. (Draw a graph to show a rider's height above the ground during a 1 min ride if possible please) Or else could you write the equation for the graph.<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 #141751 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=141751\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "If one revolution takes 30 seconds, then the wheel is moving at\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \  \frac {2 \pi}{30} \"> radians per second.\r<BR>\n" );
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document.write( "If the diameter of the wheel is 40 meters, then its radius is 20 meters and a point on the outside of the wheel is changing height at a rate of\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \  20 \cos\left(\frac {2 \pi}{30}\right)\">\r<BR>\n" );
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document.write( "meters per second <i><b>relative to the centre of the circle</b></i>, so the height function with respect to time is:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ h(t) = 21 - 20 \cos\left(\frac {2 \pi}{30}t\right)\">\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
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