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November 21, 2014

Homework Help: English,maths,physics,chemistry

Posted by Chigozie on Monday, March 19, 2012 at 5:40pm.

Topic:machine,a block and tackle of 6 pulleys is used to raise a load of 300N steadily through a height of 30m.if the work done against friction is 2000J. calculate:the work done by effort,the efficiency of the system,the applied effort.

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