Question

Two equal and opposite forces of 20 N are acting along the diameter of a wheel of radius 5 m. The moment of couple due to the forces is:

Options

• 300 Nm

• 100 Nm

• 400 Nm

• 200 Nm

Answer 1

200 Nm

Explanation:

The arm of the couple is the diameter of the wheel = 2 × 5 = 10

The moment of a couple is force multiplied by the arm = 20 × 10 = 200 Nm