Assuming 5 60 in Prob. 3.122, replace the two 40-lb forces with anequivalent
Chapter 3, Problem 3.123(choose chapter or problem)
Assuming 5 60 in Prob. 3.122, replace the two 40-lb forces with anequivalent force-couple system at D and determine whether the plumbersaction tends to tighten or loosen the joint between (a) pipe CD and elbowD, (b) elbow D and pipe DE. Assume all threads to be right-handed.
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