document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1007674>Question 1007674</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A 10kg mass is being twirled around in a horizontal circle on a 7m long string. The speed of the mass is 4m/s. <BR>\n" );
document.write( "1. Calculate the force. <BR>\n" );
document.write( "2. How is the force acting on the mass? (What direction is the force acting?)<BR>\n" );
document.write( "3. What is the \"f-word\" that is a false concept of uniform circular motion?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #623505 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=623505\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1)  The centripetal force is calculated as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F+=+m%2Av%5E2+%2F+r ALIGN=MIDDLE  ALT=\"F+=+m%2Av%5E2+%2F+r\"   DISABLED_style= \"max-width:90%; height:auto;\" > so that<BR>\n" );
document.write( "F = 10*4^2 / 7 = 160 / 7 = 22.86 N<BR>\n" );
document.write( "2)  Centripetal means \"toward the center,\" and that is the direction the force is directed.<BR>\n" );
document.write( "3)  The centrifugal \"force\" is the mythical force commonly believed to be involved here. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );