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9th igcse-physics-moments of force
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- 2. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise momenrs • To use the Principle of moments to solve numericals
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- 6. Moments The moment offorce depends on the following factors:
- 7. Moments The moment offorce depends on the following factors: • The size (magnitude) of the force • The perpendicular distance between the line of action of the force and the turning point which is called the pivot
- 8. How do we calculatethe moment of force?
- 9. Moments Moment of force=Force x perpendicular distance from the pivot to line of action of the force Moment = F x d
- 10. Moments Moment of force=Force x perpendicular distance from the pivot to line of action of the force Moment = F x d Moment is measured in Newton metres (Nm)
- 11. What are the Typesof Moments?
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- 14. What is aclockwise moment?
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- 16. How to determine clockwiseor anticlockwise moment?
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- 19. What is aanti- clockwise moment?
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- 24. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise moments • To use the Principle of moments to solve numericals How confident do you feel?
- 25. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise moments • To use the Principle of moments to solve numericals How confident do you feel?
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- 32. Let us lookat some examples
- 33. Can you findthe force and distance?
- 34. Can you findthe force and distance?
- 35. Can you findthe force and distance?
- 36. Can you findthe force and distance?
- 37. Can you findthe force and distance?
- 38. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise momenrs • To use the Principle of moments to solve numericals How confident do you feel?
- 39. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise momenrs • To use the Principle of moments to solve numericals How confident do you feel?
- 40. Let us lookat the Principle of Moments
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- 42. Principle of moments clockwisemoments = anticlockwise moments
- 43. Principle of moments Letus Solve some numericals on Principle of Moments
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- 45. Numericals on Principleof moments
- 46. Numericals on Principleof moments
- 47. Numericals on Principleof moments
- 48. Numericals on Principleof moments
- 49. Numericals on Principleof moments
- 50. Numericals on Principleof moments
- 51. Numericals on Principleof moments
- 52. Numericals on Principleof moments Some important points to be noted: 1.The unit for force must be in Newton, the unit for distance must be in metres. 2.The distance must be measured from the force to the pivot
- 53. Numericals on Principleof moments Find F
- 54. Numericals on Principleof moments If the system is balanced, the anticlockwise turning effects of Force F must be equal the clockwise turning effect
- 55. Numericals on Principleof moments
- 56. Numericals on Principleof moments In order to balance the 5N force acting at 0.5m from the pivot, we require 10N force acting in the opposite direction but at 0.25m
- 57. Unbalanced Forces Sometimes momentscan easily Unbalanced- even when we don’t want them to!
- 58. Numericals on Principleof moments
- 59. Numericals on Principleof moments
- 60. Numericals on Principleof moments
- 61. Numericals on Principleof moments
- 62. Let us nowtest your knowledge
- 69. When more thanone force acts in the same direction, their overall turning effect is just the _______ of their moments
- 70. When more thanone force acts in the same direction, their overall turning effect is just the sum of their moments
- 71. When forces actin a different direction, yet still balance, the total turning effect in each direction will be the same:
- 72. When forces actin a different direction, yet still balance, the total turning effect in each direction will be the same: Sum of clockwise moments = sum of anticlockwise moments
- 73. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise momenrs • To use the Principle of moments to solve numericals How confident do you feel?
- 74. Learning Outcomes • Toidentify what are the forces that will give rise to clockwise/anticlockwise moments • To calculate clockwise/anticlockwise momenrs • To use the Principle of moments to solve numericals How confident do you feel?
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