see i never said my method is the rule of the day , it can b applied anywhere.. there are instances were the method i stated bcoms tugh 2 apply anyway here, See waterdemon's post for the forces on M and m. Consider Tension force.. T force on m=2T one due to the string at the bottom and the other due to the string attached 2 the pulley at the top, wich in turn is attached to M and Tension acting on m =T T.xm +2TxM=0 on differentiating, so am=2aM
Moderation Team
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