(Answered) A force of 491 lb is used to push a box 103 ft across a

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A force of 49.1 lb is used to push a box 10.3 ft across a level floor.

(a) How much work was done on the box?

(b) What is the change of potential energy as a result of this move?

(a) W =blank × 10² ft ·lb.

(b) PE = Blank ft ·lb

A=blank answ

B=blank anew

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