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![[Post New]](/templates/default/images/icon_minipost_new.gif) 19 Nov 2006 17:12:29 IST
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when we consider three cases of AT WOOD's machine,in the first case one end of the string have mass "M"and other end have a mass of"2M". in the second case one end have mass "M" and other end of the string is pulled by "2Mg"force.in the third case one end of the string have mass "M"and other end have mass"M"and this mass is pulled by a force of Mg.In all these cases what is the difference? why there is difference in accelaration,though other end of the string has 2Mg force in different forms.
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