1,288 prompts matching "WAEC exam question: symmetric functions of roots"
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Learn: The component of a force along a stated direction
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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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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Learn: What an unclosed polygon of forces tells you
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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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Explain Back: The units of a moment, and why they are newton metres
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Learn: The algebraic sum of moments when the senses differ
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Quiz: The point about which the total moment of a set of forces vanishes
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Explain Back: Locating the point of concurrence on a diagram
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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Learn: The expectation of a discrete random variable
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Learn: Finding the coefficient of a stated power in an expansion
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Spot My Mistake: The probability of exactly r successes in n trials
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