701 prompts matching "Solving a quadratic that must be rearranged before factorising"
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Worked Example: The direction of the resultant of two forces
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Spot My Mistake: The greatest and the least resultant of two given forces
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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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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Worked Example: Drawing the polygon of forces to scale
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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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Worked Example: The moment of a force about a point on its own line of action
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Worked Example: The total moment of three parallel forces about one end
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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Worked Example: Matching each force to the sine of the angle opposite it
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Worked Example: Finding a particular term of a binomial expansion
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Spot My Mistake: The probability of exactly r successes in n trials
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Worked Example: The probability of no events at all in a Poisson distribution
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Spot My Mistake: The proportion of a normal distribution within one, two and three standard deviations
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Spot My Mistake: Reading a probability from the standard normal table
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Worked Example: Finding a value from a given probability by working backwards
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Spot My Mistake: When the normal distribution may approximate the binomial
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