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what is the difference between work and workdone

I hope the following references will help you:

http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Work/DefinitionWork.html

http://en.wikipedia.org/wiki/Mechanical_work

http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/energy/u5l1aa.html

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