The two shafts of a speed-reducer unit are subjected to couples of magnitude M1 = 15
Chapter 3, Problem 3.75(choose chapter or problem)
The two shafts of a speed-reducer unit are subjected to couples of magnitude M1 = 15 lbft and M2 = 3 lbft, respectively. Replace the two couples with a single equivalent couple, specifying its magnitude and the direction of its axis.
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