GCSE Physics – Moments

Last updated: 11/05/2020
OCR 21st Century GCSE Science – Physics higher Explaining motion GCSE Physics – Moments

Learning Objectives

-I can describe how the application of a force can cause an object to rotate
-I can use, rearrange and recall the units needed for M = Fd
-I can describe what happens to an object if the clockwise and anti-clockwise forces are balanced or unbalanced
-I can explain how levers and gears work

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  1. Current
  2. Review
  3. Answered

  1. What can a system of forces cause?

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  2. What can a force cause?

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  3. What do we call the turning effect of a force?

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  4. What is the principle of moments?

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  5. When does the principle of moments apply?

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  6. When can we not use the principle of moments?

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  7. What is the moment equation?

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  8. What is the moment of a force measured in?

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  9. What is the force measured in?

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  10. What must distance be in the moment formula?

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  11. What is the moment of a force acting through the pivot?

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  12. What does equilibrium mean?

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  13. What is the moment of weight 8 N if it acts through the pivot of a 12 m rod?

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  14. A force of 40 N is applied to a spanner to turn a nut at a perpendicular distance of 20 cm. What is the moment of the force?

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  15. A force of 200 N is applied to a spanner to turn a nut at a perpendicular distance of 2 cm. What is the moment of the force?

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  16. What is the size of a force which provides a 40 Nm moment acting 400cm from the pivot?

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  17. What is the size of a force which provides a 100 Nm moment acting 10 cm from the pivot?

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  18. A lever is made of a 0.4 m long beam, with the pivot at 0.1 m from the end of the beam. What is the heaviest load that could be lifted using a 500 N force?

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  19. A lever is made of a 0.5m long beam, with the pivot at 0.1m from the end of the beam. What is the heaviest load that could be lifted using a 1000N force?

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  20. A 500 N child sits 50 cm from the centre of a seesaw. How far from the centre must a 600 N child sit to cause no overall movement?

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  21. A 650 N child sits 45 cm from the centre of a seesaw. How far from the centre must a 400 N child sit to cause no overall movement?

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  22. A 700 N child sits 32 cm from the centre of a seesaw. How far from the centre must a 450 N child sit to cause no overall movement?

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  23. What is a lever?

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  24. What do levers consist of?

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  25. What is a gear?

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