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A box weighing 2000 N is to be slowly sl...

A box weighing 2000 N is to be slowly slid through 20 m on a straigh track having friction coefficient 0.2 with the box. A find the work done by the person pulling the box wilth a chain at angle `theta` with the horizontal. B. find the work when the person has chosen a value of `theta` which ensures him the minimum magnitude of the force.

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