1,018 prompts matching "A pair with equal roots, meaning one solution only"
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Spot My Mistake: Why the inverse must be applied on the correct side
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Learn: Inertia, and what mass actually measures
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Quiz: Why mass stays the same wherever the body is taken
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Learn: Converting a weight given in kilogram-force into newtons
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Learn: The resultant of two perpendicular forces
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Spot My Mistake: The greatest and the least resultant of two given forces
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Quiz: The magnitude of the resultant of several coplanar forces
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Learn: A space diagram and a force diagram drawn side by side
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Learn: Choosing the point about which to take moments
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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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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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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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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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Learn: Finding two unknown forces by Lami's theorem
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