1,333 prompts matching "A binary operation defined on the integers"
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Practice: The direction of the resultant of several coplanar forces
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WAEC Prep: The forces on a body resting on a rough horizontal plane
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WAEC Prep: The forces on a body suspended by a single string
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Explain Back: The forces acting on a body hanging from two strings
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Worked Example: Using the sine rule on the triangle of forces
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WAEC Prep: The two conditions for a rigid body to be in equilibrium
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Practice: Why the forces must sum to nought in two perpendicular directions
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WAEC Prep: The polygon of forces for five concurrent forces
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WAEC Prep: The resultant read off an unclosed polygon
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WAEC Prep: The polygon of forces for several forces in equilibrium
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Worked Example: Drawing the polygon of forces to scale
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WAEC Prep: Friction, and the direction in which it acts
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Quiz: The coefficient of friction between two surfaces
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Practice: Limiting friction, and the greatest value it can reach
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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 moment of a force about a point on its own line of action
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Explain Back: The units of a moment, and why they are newton metres
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Worked Example: The total moment of three parallel forces about one end
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