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# Moment and levers

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### Moment and levers

1. 1. Moment and Levers<br />IGCSE Physics @ferrytanoto<br />
2. 2. The turning effect or moment of a force is a measure of the turning effect of a force.<br />
3. 3. Moment of a force is measured by multiplying the forceby the perpendicular distance of the line of action of the force from the fulcrum.<br />
4. 4. Moment of a force depends on the magnitude of the force and the perpendicular distance from the line of action of the force to the pivot.<br />
5. 5. If an object is in equilibrium there is no resultant turning effect and no resultant force.<br />
6. 6. The Law of Moments (The Law of the Lever)<br />When a body is in equilibrium the sum of the clockwise momentsabout any point equals the sum of the anticlockwise moments about the same point.<br />
7. 7. A leveris any device which can turn about a pivot. In a working lever a force called the effortis used to overcome a resisting force called the load. The pivotal point is called the fulcrum.<br />
8. 8. Levers<br />Clockwise moment = Anticlockwise moment<br />
9. 9.
10. 10. Condition for Equilibrium<br />The sum of the forces in one direction equals the sum of the forces in the opposite direction.<br />The law of moments must apply.<br />
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