Lesson M9.1.1

M9.1.1 Moments in simple static equilibrium Quiz: Pearson Edexcel Maths, Unit 19

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson M9.1.1, Moments in simple static equilibrium: 20 multiple choice questions for the Pearson Edexcel Maths (9MA0), Unit 19: Moments, written with Revision Ninja.

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The 20 questions

  1. What is the SI unit for the moment of a force?

    • Newton metres
    • Newtons
    • Joules
    • Pascal metres

  2. Which quantity must be zero for a rigid body to be in rotational equilibrium?

    • Resultant moment
    • Resultant force
    • Linear velocity
    • Total mass

  3. What term describes the perpendicular distance from the pivot to the line of action of a force?

    • Lever length
    • Displacement
    • Moment arm
    • Radius vector

  4. Which condition is also required alongside zero resultant moment for full static equilibrium?

    • Zero acceleration
    • Zero resultant force
    • Zero potential energy
    • Zero velocity

  5. If a uniform beam is in equilibrium, where does its weight act?

    • Geometric centre
    • Left end
    • Right end
    • The pivot

  6. A force of 10 N acts 2 m from a pivot. What is the magnitude of the moment?

    • 20 Nm
    • 5 Nm
    • 10 Nm
    • 40 Nm

  7. Calculate the perpendicular distance if a 50 Nm moment is produced by a 10 N force.

    • 500 m
    • 10 m
    • 5 m
    • 0.2 m

  8. Find the force required to create a 30 Nm moment at a distance of 3 m.

    • 33 N
    • 10 N
    • 90 N
    • 0.1 N

  9. A light rod rests on a pivot with equal weights at equal distances. What is the reaction at the pivot?

    • Sum of weights
    • Zero
    • Product of weights
    • Difference of weights

  10. A 20 N weight is 1.5 m left of a pivot. What balancing clockwise moment is needed?

    • 13.3 Nm
    • 21.5 Nm
    • 45 Nm
    • 30 Nm

  11. What happens to the moment of a force if the angle to the beam decreases from 90 degrees?

    • It becomes zero
    • It decreases
    • It increases
    • It stays same

  12. When taking moments in static equilibrium, about which point is calculation usually easiest?

    • End of beam
    • Centre of mass
    • The pivot
    • Point of maximum load

  13. A non-uniform beam rests horizontally. Where is its centre of mass located?

    • At midpoint
    • Not at midpoint
    • At the right end
    • At the left end

  14. A 4 m uniform plank weighing 100 N is pivoted at its centre. What is the moment about the pivot?

    • 200 Nm
    • 50 Nm
    • Zero
    • 400 Nm

  15. Two parallel forces act in opposite directions on a body, creating rotation without translation. What is this called?

    • A couple
    • A torque pair
    • A resultant
    • A pivot

  16. A heavy box sits on a slope just before tipping. Where does the line of action of its weight act?

    • Outside the base
    • To the left
    • Through its centre
    • Through pivot edge

  17. A 50 N weight hangs 0.4 m from a pivot. A force F at 2 m balances it. Find F.

    • 100 N
    • 10 N
    • 250 N
    • 5 N

  18. A ladder leans against a smooth vertical wall. What direction is the wall reaction force?

    • Parallel to wall
    • Perpendicular to wall
    • At 45 degrees
    • Vertically upwards

  19. Why is a wider base of support beneficial for static stability?

    • Reduces own weight
    • Eliminates friction
    • Lowers tipping risk
    • Increases total mass

  20. If a beam is pivoted off-centre, what is true about the upward force at the pivot?

    • Equals zero
    • Acts downwards
    • Supports total weight
    • Exceeds total weight

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