Equilibrium: An irregularly shaped object that is 10 m long is placed with each end on a scale. If the scale on the right reads 96 N while the scale on the left reads 71 N, how far from the left end is the center of gravity of this object?
A. 5.7 m
B. 7.4 m
C. 4.3 m
D. 14 m
Answer: A
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A. 
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C. 
D. 
E. 