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15. During the construction of a high-rise building, 60-kg block is vertically lifted 20 meters from the surface of the earth. What is the change

15. During the construction of a high-rise building, 60-kg block is vertically lifted 20 meters from the surface of the earth. What is the change in the gravitational potential energy of the block? A. -11800 J B. +11800 J C. +8000 J D. -8000 J E. zero joules

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