Moment equals force times perpendicular distance from pivot

Steps:

• Convert distances to meters: A=0.90 m, B=2.0 m, C=0.50 m, D=3.0 m
• Use formula: moment (Nm) = force (N) × distance (m)
• Calculate: A=50×0.90=45; B=30×2.0=60; C=80×0.50=40; D=18×3.0=54
• Compare values: B produces largest moment at 60 Nm

Why B is correct:

• Per the moment formula (τ = F × d), B yields the maximum product of 60 Nm

Why the others are wrong:

• A: 45 Nm, smaller than 60 Nm
• C: 40 Nm, smaller than 60 Nm
• D: 54 Nm, smaller than 60 Nm

Final answer: B