document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1071394>Question 1071394</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Bobby McG (who has a mass of 70kg) jumps out of an airplane and notices that she starts to accelerate at a rate of 6m/s^2.\r<BR>\n" );
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document.write( "What is the force of gravity acting on Bobby?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #686372 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=686372\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I do not think anyone, on Earth, jumps of an airplane and starts to accelerate at a rate of 6m/s^2. The initial downwards acceleration rate should be 9.7 - 9.8 m/s^2, no matter how high your airplane is flying, and it should take several seconds of increasing downwards speed and increasing air drag force to reach an acceleration of 6m/s^2.<BR>\n" );
document.write( "At that point the acceleration has little to do with the force of gravity.<BR>\n" );
document.write( "The net force acting upon a 70kg body accelerating at 6m/s^2 is 4200 Newtons:<BR>\n" );
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document.write( "However, that is not the \"force of gravity.\" It is the sum of the downwards force of gravity, and a substantial upwards air resistance force. </SPAN>\n" );
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