Question

difference between torque and couple

Answer 1

couple is two equal but opposite forces applied on two different points.

Torque is force applied on one point

Answer 2

Torque is produced due to a single force. It is the turning effect of a force.eg we rotate a spanner in clockwise direction to tighten the nut. The turning effect produced is called torque or moment of force.

Couple is produced due to two forces that are equal in magnitude but opposite in direction( unlike parallel forces) and do not have the same line of action.eg a double arm spanner or a steering wheel etc.