1,154 prompts matching "Checking a factorisation by expanding it again"
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Spot My Mistake: The point at which a loaded beam will tip about its support
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WAEC Prep: A couple, and why its moment is the same about every point
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Show All Working: Replacing two parallel forces by a single resultant
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Common Mistakes: The centre of gravity of a uniform lamina
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Learn: The velocity of one body relative to another
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Worked Example: Relative velocity when two bodies move along the same line
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Quiz: Relative velocity when the two motions are at right angles
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Practice: The triangle of velocities for a boat crossing a river
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Spot My Mistake: An aeroplane in a cross-wind, and its resultant track
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WAEC Prep: Limiting equilibrium, with a body on the point of sliding
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Final Revision: The speed of a body when it reaches the foot of an incline
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Learn: Angular velocity, and how it relates to linear speed
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Quiz: The centripetal force, and what supplies it in a given situation
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Common Mistakes: The condition for a body to complete a vertical circle
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Worked Example: The amplitude, period and frequency of a simple harmonic motion
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Quiz: The velocity of a body in simple harmonic motion at a given displacement
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Explain Back: The displacement written as x equals a sin omega t
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Learn: Hooke's law, and what the modulus of elasticity means
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Spot my mistake: Treating the kilogram and the kilogram weight as the same unit
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Spot my mistake: Adding the magnitudes of concurrent forces to get the magnitude of their resultant
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