1,245 prompts matching "Empty set and its notation"
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Practice: The value of g used in Nigerian examination papers
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Practice: The parallelogram law of forces
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Spot My Mistake: Compounding three forces acting at one point
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Worked Example: The direction of the resultant of two forces
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Practice: Choosing the most convenient pair of directions to resolve along
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Quiz: The magnitude of the resultant of several coplanar forces
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Practice: The direction of the resultant of several coplanar forces
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Worked Example: Using the sine rule on the triangle of forces
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Practice: Why the forces must sum to nought in two perpendicular directions
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Worked Example: Drawing the polygon of forces to scale
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Practice: Finding an unknown force from a closed polygon
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Quiz: The coefficient of friction between two surfaces
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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Worked Example: The total moment of three parallel forces about one end
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Practice: Resolving three forces in two perpendicular directions
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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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Worked Example: Matching each force to the sine of the angle opposite it
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