Multiple Choice
During the construction of a high rise building, 40-kg block is vertically lifted 20 meters from the surface of the earth. To one significant figure, what is the change in the gravitational potential energy of the block?
A) +800 J
B) -800 J
C) +8000 J
D) -8000 J
E) zero joules
Correct Answer:
Verified
Correct Answer:
Verified
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