1,334 prompts matching "An argument written in words and tested for validity"
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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 suspended by a single string
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WAEC Prep: Drawing a clear force diagram for a body at rest
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WAEC Prep: A rigid body held in equilibrium by four 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 several forces in equilibrium
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Learn: What an unclosed polygon of forces tells you
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WAEC Prep: Why friction is called a self-adjusting force
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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WAEC Prep: The total moment of two forces about the same point
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WAEC Prep: Why three non-parallel forces in equilibrium must be concurrent
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WAEC Prep: The conditions for a particle under three forces to be in equilibrium
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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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WAEC Prep: Lami's theorem derived from the triangle of forces
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Learn: Finding two unknown forces by Lami's theorem
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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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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