Moment depends on force magnitude and perpendicular distance

Steps:

• Identify the moment arm (perpendicular distance) from point P to each force's line of action using the diagram.
• Calculate moment for each: M = F × d, where d is the moment arm (torque sign depends on direction, but magnitude compared here).
• Compare magnitudes: 6N force has largest F × d value.
• Select the force with maximum |M|.

Why A is correct:

• The 6N force has the largest product of force magnitude and moment arm, per the torque formula M = F × d_perp.

Why the others are wrong:

• B: 2N force has smallest magnitude, yielding lowest M despite any arm.
• C: 4N force's M is less than 6N's due to smaller F or shorter d.
• D: Insufficient details on this force; its M is smaller than A's.

Final answer: A