1,318 prompts matching "Solving a surd equation with terms on both sides"
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Explain Back: The forces acting on a body hanging from two strings
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Worked Example: Using the sine rule on the triangle of forces
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Practice: Why the forces must sum to nought in two perpendicular directions
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Worked Example: Drawing the polygon of forces to scale
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Practice: Finding an unknown force from a closed polygon
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Practice: Limiting friction, and the greatest value it can reach
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Worked Example: The moment of a force about a point on its own line of action
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Explain Back: The units of a moment, and why they are newton metres
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Worked Example: The total moment of three parallel forces about one end
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Explain Back: Locating the point of concurrence on a diagram
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Explain Back: A probability distribution table for a discrete random variable
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Practice: Using a binomial expansion to approximate a number
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Practice: The probability of at least one success
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Practice: The probability of exactly r events in a Poisson distribution
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Worked Example: The probability of no events at all in a Poisson distribution
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Practice: The variance of a binomial distribution as npq
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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Explain Back: Converting a value to a z-score
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Worked Example: The continuity correction when approximating a discrete distribution
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