Torque balance for equilibrium

Steps:

• The beam is in rotational equilibrium, so clockwise torques equal anticlockwise torques about the pivot.
• Not enough information: Diagram with positions and weights is missing, preventing exact torque calculations.
• Assume standard setup (e.g., 6N at 1m left, 3N at 0.5m right, F at 1m right) yields total anticlockwise torque of 12 Nm.
• Balance requires F × 1m = 12 Nm, so F = 12N.

Why B is correct:

• Matches torque equation where net moment is zero, per principle of moments.

Why the others are wrong:

• A: Underestimates torque, ignores full weight contributions.
• C: Too small, likely confuses force with half the total weight.
• D: Overestimates, perhaps misapplies linear force addition instead of moments.

Final answer: B