document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1184543>Question 1184543</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A spring scale is used to measure force and to determine the mass of a sample of moon rocks on the moon’s surface. The springs were calibrated for the earth’s gravitational acceleration of 9.8 m/s2. The scale reads 4.5 kg, and the moon’s gravitational attraction is 1.8 m/s2. Determine the samples mass. What would the reading be on a beam balance scale?\r<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 #815203 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52776)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=815203\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "The scale reads &nbsp;4.5 &nbsp;kg &nbsp;on the moon surface, &nbsp;but these &nbsp;4.5 &nbsp;kg are &nbsp;NOT &nbsp;THE &nbsp;MASS: &nbsp;it is the weight \r<BR>\n" );
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document.write( "presented in very old units.\r<BR>\n" );
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document.write( "Kilograms were used as the unit of force &nbsp;(of weight, &nbsp;in particular) &nbsp;before &nbsp;1960, &nbsp;when they were replaced by newtons.\r<BR>\n" );
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document.write( "So, &nbsp;if on the moon surface the scales reads 4.5 kilograms, &nbsp;it is &nbsp;NOT &nbsp;THE &nbsp;MASS &nbsp;of the sample: \r<BR>\n" );
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document.write( "it is its weight there.\r<BR>\n" );
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document.write( "The mass of the sample, &nbsp;under given condition,  &nbsp;is  &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.5%2A%289.8%2F1.8%29 ALIGN=MIDDLE  ALT=\"4.5%2A%289.8%2F1.8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 24.5 kilogram &nbsp;<U>of mass</U>.<BR>\n" );
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document.write( "Solved.\r<BR>\n" );
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