787 prompts matching "Explaining why we rationalise denominators"
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Learn: A space diagram and a force diagram drawn side by side
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WAEC Prep: The triangle of forces used together with the cosine rule
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WAEC Prep: Labelling the triangle of forces from the space diagram
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WAEC Prep: The triangle of forces for three forces in equilibrium
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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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 two conditions for a rigid body to be in equilibrium
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Learn: Choosing the point about which to take moments
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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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Learn: What an unclosed polygon of forces tells you
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WAEC Prep: A body just about to slide on a horizontal surface
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WAEC Prep: Friction, and the direction in which it acts
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WAEC Prep: The moment of a force about the foot of a pole
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WAEC Prep: Calculating a moment as force times perpendicular distance
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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