<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1276" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi Mark,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face="Courier New" size=2>>> If you add mass to the = hammer, keep same force on key (yes, Don, it's a torque when you multiply it by = the key radius), then the action will accelerate less.  That means less = energy in the key and wippen (we didn't change their inertias).  So if we = have the same total energy, less in the key and wippen, then MORE must have gone = into the key, not the same amount.  </FONT></DIV> <DIV><FONT face="Courier New" size=2></FONT> </DIV> <DIV><FONT face="Courier New" size=2>Yes, you're right.  I = totally misread what you had written.  I agree.  </FONT><FONT face="Courier = New" size=2>A distillation of this concept is that the energy distribution = between components is proportional to their inertial contribution.</FONT></DIV> <DIV><FONT face="Courier New" size=2></FONT> </DIV> <DIV><FONT face="Courier New" size=2>Peace,</FONT></DIV> <DIV><FONT face="Courier New" size=2>Sarah</FONT></DIV> <DIV> </DIV> <DIV><FONT face="Courier New" = size=2></FONT> </DIV></BODY></HTML>