Question

Prove that

Moment of couple = Force × couple arm.

Answer 1

Moment of force F at the end A = F × OA (anticlockwise)

Moment of force F at the end B = F × OB (anticlockwise)

Total moment of couple = F × OA + F × OB

= F (OA + OB)

= F × AB

= Force × Couple arm