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Jan5-05, 08:58 AM   #3
 
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The "rigorous" proof should follow from an analysis of the equations [itex]F_1=ma_1[/itex] and [itex]F_2=ma_2[/itex]. What is [itex]a_2[/itex] in terms of [itex]a_1[/itex] if you set [itex]F_2=2F_1[/itex]?