Moment of a force about a pivot Steps:

• Force F = 60 N acts downward on the pedal.
• Perpendicular distance d from pivot to line of force is 0.16 m (from diagram).
• Apply formula: moment M = F × d.
• Calculate M = 60 × 0.16 = 9.6 Nm. Why B is correct:
• Matches moment formula M = F d, where d = 0.16 m is the perpendicular distance. Why the others are wrong:
• A: Assumes incorrect d = 0.12 m.
• C: Assumes incorrect d = 0.20 m.
• D: Assumes incorrect d ≈ 0.33 m. Final answer: B