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Chrisstina
I beleive she isnt doing any work due to holding the box motionless, you must be exerting a force in the direction of the box motion. If she is just standing there holding the box their isn't no work becuase no distance has been covered. work = force = distance.
W = F * d, and since d=0, therefore W=0.
 (If you want to be mathematical about it.)

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