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A Force Acts on an Object, Causing It to Move

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A force acts on an object, causing it to move parallel to the force. The graph in the figure shows this force as a function of the position of the object. How much work does the force do as the object moves from 4 m to 6 m?
A force acts on an object, causing it to move parallel to the force. The graph in the figure shows this force as a function of the position of the object. How much work does the force do as the object moves from  4 m to  6 m?   A)   30 J B)   0 J C)   20 J D)   70 J E)   40 J


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