Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

Two equal and opposite forces, each of magnitude \( 25\text{ N} \), act at the two ends of a light rigid rod of length \( 1.2\text{ m} \). Each force makes an angle of \( 30^\circ \) with the rod. The magnitude of the couple formed by these two forces is:

1. A
   \( 15\sqrt{3}\text{ N m} \)
2. B
   \( 30.0\text{ N m} \)
3. C
   \( 15.0\text{ N m} \)
4. D
   \( 7.5\text{ N m} \)