1,334 prompts matching "Explain permutations and combinations back to me"
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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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WAEC Prep: Labelling the triangle of forces from the space diagram
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Worked Example: Using the sine rule on the triangle of forces
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WAEC Prep: A rigid body held in equilibrium by four forces
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WAEC Prep: The three unknowns a rigid body problem usually carries
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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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Learn: What an unclosed polygon of forces tells you
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Practice: Finding an unknown force from a closed polygon
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WAEC Prep: Why friction is called a self-adjusting force
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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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WAEC Prep: A particle in equilibrium on a smooth inclined plane
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WAEC Prep: A knot held in equilibrium by three strings
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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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WAEC Prep: A lamp hanging from two wires, solved by Lami's theorem
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