In the discussion, it is established that a couple always produces rotational motion when no frictional forces are present. The torque generated by a couple is defined as the moment created by two equal and opposite forces acting at a distance. However, when additional forces are involved in a system, the resultant torque may differ from the torque of the couple alone, as it includes contributions from other forces. Therefore, while a couple induces rotation, its torque does not always equal the resultant torque in complex systems.
PREREQUISITESThis discussion is beneficial for physics students, mechanical engineers, and anyone interested in understanding the principles of rotational dynamics and torque in various systems.