Torque: A man in a gym is holding an 8.0-kg weight at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the weight if his arm is horizontal?
A. 0.24 N ? m
B. 4.4 N ? m
C. 43 N ? m
D. 15 N ? m
E. 0 N ? m
Answer: C
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